Prowler, Clawed Thief

Deck Summary

Prowler is a Dimir tempo-midrange deck built around a dense, carefully selected Villain package.

The deck contains:

• 100 cards exactly.
• 41 lands.
• 30 creatures, including the commander.
• 24 Villains, including the commander.
• 14 instants.
• 7 sorceries.
• 5 noncreature artifacts.
• 3 enchantments.
• An average nonland mana value of approximately 2.69.

The mana curve is:

There are no spells costing six or more mana.

Why Prowler?

Prowler costs only three mana, has menace and connives whenever another Villain enters under our control.

Connive does three things this deck actively wants:

1. It improves card quality by exchanging excess lands or situational cards.
2. It grows Prowler when a nonland card is discarded.
3. It puts cards with graveyard utility into the correct zone.

Unlike the previous Najeela build, this deck does not ask its mana base to produce early red, double blue, double black and double red. Every spell is blue, black or colourless.

Prowler does not generate raw card advantage on his own, so the deck does not depend entirely on him. Black Cat, Agent Venom, Symbiote Spider-Man, Fact or Fiction, Risky Research, Deadly Dispute and the graveyard abilities provide actual resources when the game becomes attritional.

Why Not Najeela?

Najeela is individually more threatening than Prowler, but the available Spider-Man mana base cannot properly support the broad Grixis shell that maximises her theoretical ceiling.

A narrow Rakdos Najeela deck has a good commander but loses the strongest Villain payoff, the best selection and much of the available tempo interaction. A Grixis Najeela deck gains those cards but produces too many hands that cannot cast its spells on schedule.

Prowler sacrifices some raw command-zone pressure for:

• A genuinely reliable two-colour mana base.
• A coherent tribal engine.
• Better support for double-blue and double-black spells.
• Fewer uncastable or mismatched hands.
• A functional plan after repeated commander removal.

Norman Osborn has a higher engine ceiling, but he requires three colours, must connect in combat and then requires a four-mana transformation before Green Goblin begins generating substantial value.

Prowler starts converting Villains into value immediately.

Primary Game Plan

The ideal progression is:

Turns 1 and 2

Develop mana, establish a cheap permanent or interact.

The best early plays are:

• Lady Octopus.
• Ponder.
• Sol Ring.
• Flying Octobot.
• Mob Lookout.
• Mysterio's Phantasm.
• Common Crook.
• Hydro-Man.
• The Soul Stone.

Turn 3

Cast Prowler when the opponent cannot punish the tempo loss too severely.

There is no requirement to cast Prowler automatically on turn 3. Against open removal, it can be better to deploy another Villain or leave interaction available and cast Prowler when at least one subsequent trigger can be secured.

Turns 4 and 5

Cast Villains while protecting Prowler or removing blockers.

Each Villain:

• Triggers Prowler.
• Improves the hand through connive.
• Potentially grows the commander.
• Increases Mysterio's future token production.
• May provide its own enters or graveyard value.

Closing the Game

The deck normally wins through one of three routes:

1. A large Prowler dealing commander damage through menace or flying.
2. A wide Mysterio battlefield.
3. Attrition through Black Cat, Superior Spider-Man, Agent Venom and recurring graveyard value.

The Villain Core

Not every legal Villain is included. The selected Villains either cost little enough to maintain tempo or provide a meaningful effect beyond their creature type.

Cheap Development

Lady Octopus, Inspired Inventor grows whenever the deck draws its first or second card each turn. Prowler's connive helps generate ingenuity counters, and the deck contains enough relevant artifacts for her activated ability to matter.

Common Crook is not included because a 2/2 is inherently powerful. It is a two-mana Villain that leaves a Treasure when it dies and is an excellent Deadly Dispute target.

Flying Octobot becomes a legitimate evasive threat as Villains enter.

Hydro-Man, Fluid Felon rewards the high blue count and becomes an additional blue source during the opponent's turn.

Merciless Enforcers provides a cheap Villain, stabilises races through lifelink and retains a late-game mana sink.

Mob Lookout produces one connive when it enters and also triggers Prowler. With Prowler in play, it can therefore generate two separate connive actions.

Mysterio's Phantasm attacks safely, fills the graveyard and contributes to Mysterio's count.

Three-Mana Utility

Alchemax Slayer-Bots removes a blocker for two untap steps while adding a Villain.

Doc Ock's Henchmen can be deployed at instant speed and becomes a self-contained connive threat when it attacks.

Mechanical Mobster provides graveyard interaction and an additional connive.

Swarm, Being of Bees is one of the best Prowler cards. It can be discarded to connive and then cast for a single black mana through mayhem.

Symbiote Spawn punishes removal, stabilises the life total and works with Deadly Dispute and Agent Venom.

Tombstone, Career Criminal is a central engine. It returns a Villain and reduces the generic cost of every later Villain, enabling multiple-spell turns.

Venomized Cat blocks large attackers, fills the graveyard and adds another Villain body.

Payoffs

Chameleon, Master of Disguise can copy Prowler without causing a legend-rule conflict because it retains its own name. Every later Villain then triggers both creatures.

It can also copy Mysterio, Tombstone, Black Cat or another valuable creature. If discarded, mayhem allows it to be cast from the graveyard.

Mysterio, Master of Illusion is the deck's main finisher. He counts himself, Prowler and every other nontoken Villain. Each Illusion token he creates is also a Villain and therefore triggers Prowler.

For example, with Prowler and one other nontoken Villain in play:

1. Mysterio enters and triggers Prowler.
2. Mysterio counts three nontoken Villains: Prowler, the existing Villain and himself.
3. Three 3/3 Illusion Villains enter.
4. Those tokens generate another three Prowler triggers.

The result is nine power in tokens and four connives from a single four-mana spell.

Black Cat, Cunning Thief provides genuine card advantage and can use cards from the opponent's universe without requiring their colours.

Doc Ock, Sinister Scientist is usually protected by hexproof and becomes an 8/8 once the graveyard is sufficiently stocked.

Morlun, Devourer of Spiders is a scalable threat, life buffer and direct-damage finisher.

Supporting Creatures

The non-Villain creatures are included only when their individual function justifies reducing the tribal density.

Agent Venom turns nontoken creature deaths into cards. It does not trigger from Mysterio tokens, so it should be deployed for attrition games rather than treated as a token payoff.

Spider-Bot improves land-drop consistency and provides a disposable artifact body.

Spider-Byte, Web Warden is temporary universal interaction attached to a creature. It can be reused with Spider-Sense or Hide on the Ceiling.

Symbiote Spider-Man is an independent card-selection engine that also stocks the graveyard. Once discarded or destroyed, Find New Host can transfer the ability to Prowler.

Superior Spider-Man converts the best creature in either graveyard into a 4/4 copy. Copying Mysterio, Black Cat or Tombstone also reproduces their enters abilities.

Lyla, Holographic Assistant turns every draw, including every connive draw, into a +1/+1 counter. With Lyla in play, Prowler still grows even when a land is discarded.

Synergy Packages

Prowler and Mysterio

This is the central interaction. It requires no third card and both pieces are useful independently.

Mysterio creates a large battlefield while every token filters the hand and potentially grows Prowler. Peter Parker's Camera can copy Mysterio's triggered ability, doubling the number of tokens produced.

Camera should normally be reserved for:

1. Mysterio.
2. Black Cat.
3. Tombstone.
4. Spider-Byte.
5. A critical Prowler or Lyla trigger only when necessary.

Spending two mana merely to copy an ordinary connive trigger is rarely efficient.

Prowler and Chameleon

When Chameleon copies Prowler:

• The original Prowler triggers from Chameleon entering.
• Both creatures survive because their names are different.
• Every later Villain causes both to connive.

Chameleon can be discarded early when it cannot be cast profitably, then recovered through its mayhem cost.

The Clone Saga

The first chapter stocks the graveyard.

The second chapter can create a nonlegendary copy of:

• Mysterio.
• Prowler after a recast.
• Black Cat.
• Tombstone.
• Chameleon.
• Superior Spider-Man.

Copying Mysterio produces two separate enters triggers and two independent token armies.

Connive and Graveyard Utility

Cards that remain useful after being discarded include:

• Swarm, Being of Bees.
• Chameleon, Master of Disguise.
• Rocket-Powered Goblin Glider.
• Beetle, Legacy Criminal.
• Morbius the Living Vampire.
• Venom, Evil Unleashed.
• Symbiote Spider-Man.
• Sandman's Quicksand.
• Creatures that can be recovered by Tombstone, Reanimate or Superior Spider-Man.

Mayhem only permits a card to be cast if it was discarded during the same turn. Connive and mayhem are deliberately paired in the set's mechanics.

Rocket-Powered Goblin Glider

The preferred sequence is:

1. A Villain enters and triggers Prowler.
2. Prowler discards the Glider.
3. Cast it from the graveyard for its mayhem cost.
4. It enters attached to Prowler.

Prowler then receives +2/+0, flying and haste. Flying plus menace makes blocking extremely difficult and creates a credible commander-damage plan.

Spider-Sense

Web-slinging allows Spider-Sense to be cast for one blue mana by returning a tapped creature as part of its cost.

The best creatures to return are those with useful enters abilities:

• Mob Lookout.
• Mechanical Mobster.
• Alchemax Slayer-Bots.
• Spider-Byte.
• Tombstone.
• Mysterio.
• Black Cat.

Returning the creature is part of the alternative casting cost, so the opponent cannot prevent the return by countering Spider-Sense.

Deadly Dispute

The best sacrifice targets are:

• Common Crook, producing a second Treasure.
• Symbiote Spawn, draining for two.
• A creature already targeted by removal.
• A Mysterio token before Mysterio leaves.
• An expendable Spider-Bot.

The spell is not included simply because it is a Commander staple. The creature base provides several profitable sacrifice targets and the Treasure helps produce double-spell turns.

Sandman's Quicksand

The normal mode is an emergency small-creature sweeper.

The preferred mode is:

1. Cast a Villain during the first main phase.
2. Discard Sandman's Quicksand to Prowler's connive trigger.
3. Cast it for its mayhem cost during the same main phase.
4. Only opposing creatures receive -2/-2.

This is the deck's most synergistic answer to opposing token or low-curve strategies.

Interaction

The interaction package is deliberately creature-focused because optimised 21-life 1v1 decks are expected to place substantial pressure on the battlefield.

One and Two Mana

• Fatal Push.
• Secret Identity.
• Counterspell.
• Spider-Sense.
• Whoosh!
• Go for the Throat.
• Infernal Grasp.
• Scorpion's Sting.
• Feed the Swarm.
• Spider-Man No More.

Spider-Man No More is particularly valuable against commanders. It does not merely reduce power and toughness. It removes abilities and prevents the creature from attacking.

Secret Identity protects Prowler from targeted removal for one mana or changes its base statistics to 3/4 for an unexpected combat swing.

Three Mana

• Amazing Acrobatics.
• The Spot's Portal.
• The Death of Gwen Stacy.
• Venom's Hunger.

The Spot's Portal puts a commander on the bottom of its owner's library, forcing its controller to choose whether to move it to the command zone.

Venom's Hunger normally costs only three mana because the deck almost always controls a Villain.

Sweepers

Sandman's Quicksand handles small boards and can become one-sided.

Damnation is the deck's sole unconditional reset. It is not part of the proactive plan and should not be cast merely to exchange creatures evenly.

It exists because a midrange deck still needs one reliable way to recover from a battlefield it can no longer race or answer individually.

Mana Base

The deck uses 41 lands:

20 Island
18 Swamp
1 Command Tower
1 Multiversal Passage
1 Sinister Hideout

This produces:

• 23 potential blue sources.
• 21 potential black sources.
• 39 lands that enter untapped without paying life.
• One flexible land that can enter untapped for two life.
• Only one land that always enters tapped.

Multiversal Passage chooses one basic land type when it enters. It is therefore not simultaneously a complete blue and black source in the same game.

The deck deliberately excludes:

• Daily Bugle Building, because it is a filter rather than an independent coloured source.
• Vibrant Cityscape, because it sacrifices an entire land drop and puts the basic land onto the battlefield tapped.
• Any red, white or green land.
• Additional utility lands that would reduce early colour consistency.

Double-Coloured Costs

Blue is slightly prioritised because the deck wants to support:

• Hydro-Man on turn 2.
• Counterspell.
• Amazing Acrobatics.
• Multiple blue spells in the same turn.

The 18 Swamps plus three flexible black sources are sufficient for the later double-black costs of Morlun, Sandman's Quicksand, Damnation and Black Cat.

In a raw nine-card sample on the play, before mulligans, Ponder, Sol Ring or Spider-Bot, the deck can produce three mana with both blue and black for Prowler approximately 74% of the time.

Forty-one lands is intentional. Missing the third land prevents the central engine from functioning, while excess lands can be discarded through Prowler, Mob Lookout, Mechanical Mobster, Scorpion and other connive effects.

Acceleration and Smoothing

• Sol Ring can enable a turn-2 Prowler when the two lands produce blue and black.
• The Soul Stone accelerates black spells and provides a late recursion engine.
• Hydro-Man supplies an additional blue mana during the opponent's turn.
• Spider-Bot guarantees a future basic land draw.
• Common Crook and Deadly Dispute create Treasures.

Hydro-Man and Spider-Bot are not counted as initial land sources.

Mulligan Guide

Strong Keeps

A strong hand normally contains:

• Three lands.
• Access to both blue and black.
• At least one play before turn 3.
• A cheap Villain or interaction for the turn after Prowler.

Examples of good structures:

Three lands + cheap Villain + interaction
Two lands + Ponder or Spider-Bot + both colours
Two lands + Sol Ring + both colours
Three lands + Prowler follow-up + protection

Mulligans

Ship hands with:

• No blue source.
• No black source and no realistic way to find one.
• Two lands with neither selection nor acceleration.
• Five or more lands without a connive or draw effect.
• Multiple four and five-mana cards with no early play.
• Mysterio, Black Cat and Doc Ock without early development.
• Reactive cards that do not line up with the expected opponent.

The commander is always available. A hand does not need to contain a separate threat unless the matchup is likely to remove Prowler repeatedly.

Sequencing Priorities

Do Not Expose Prowler Without a Reason

Against untapped removal, consider waiting until Prowler can be followed by a Villain or protected by Secret Identity, Spider-Sense or Counterspell.

Play Tapped Mana Early

Sinister Hideout should normally be played on turn 1 or turn 2, when the deck is not sacrificing a critical tempo play.

Manage Lightning Greaves Carefully

Greaves protects Prowler, but shroud also prevents the deck from targeting him with:

• Mob Lookout.
• Unstable Experiment.
• Lyla.
• Secret Identity.
• Rocket-Powered Goblin Glider's attach trigger.

Because equip costs zero, move Greaves to another creature before using those effects and move it back afterwards.

Preserve Mysterio When Possible

Mysterio's tokens disappear when he leaves the battlefield. Do not expose him to removal when the opponent can eliminate both the creature and the entire token army without losing tempo.

Hide on the Ceiling can save Mysterio, but his existing tokens will still be exiled when he leaves. He will create a new army when he returns.

Discard Lands Unless a Graveyard Card Creates Immediate Value

A nonland discard grows Prowler, but that does not mean a nonland should always be discarded. Keeping removal or a payoff is usually more valuable than one +1/+1 counter.

Prioritise discarding nonlands when they have usable graveyard text or mayhem.

Matchup Approach

Against Aggressive Decks

Prioritise:

• Fatal Push.
• Scorpion's Sting.
• Infernal Grasp.
• Symbiote Spawn.
• Merciless Enforcers.
• Venomized Cat.
• Sandman's Quicksand.

Do not spend life carelessly on Multiversal Passage, Infernal Grasp, Risky Research or Reanimate.

Prowler is not always the turn-3 priority if the opponent is already presenting lethal pressure.

Against Control

Prioritise:

• Lightning Greaves.
• Secret Identity.
• Spider-Sense.
• Counterspell.
• Cheap Villains.
• Black Cat.
• Fact or Fiction.

Avoid committing every Villain before Mysterio. Prowler plus one additional threat can be enough to force interaction.

Black Cat is particularly strong because its exiled cards remain available even after Black Cat leaves.

Against Creature-Heavy Midrange

Prowler's menace, deathtouch creatures and efficient removal are valuable.

Mysterio is the primary way to break a stalled battlefield. Camera and The Clone Saga should be preserved for Mysterio when possible.

Against Graveyard Decks

Mechanical Mobster and The Death of Gwen Stacy provide main-deck graveyard interaction.

Superior Spider-Man can remove and copy the opponent's best graveyard creature.

Against Fast Combo

The deck is not a dedicated control deck. It must combine a clock with:

• Counterspell.
• Spider-Sense.
• Amazing Acrobatics.
• Whoosh!
• Targeted removal when the combo uses creatures.

Do not keep a slow value hand merely because it contains Black Cat or Fact or Fiction.

Deliberate Exclusions

Frantic Search

Frantic Search does not generate card advantage. Untapping three lands is valuable only when the deck can convert the discarded cards or the temporary mana sequence into a decisive play.

This deck already receives repeatable discard from Prowler and its Villains. It does not need a three-mana spell that exchanges three cards in hand for two new cards merely because it can become mana-neutral.

Brainstorm

The deck has too few shuffle effects to reliably clear unwanted cards placed on top of the library. Ponder is retained because it can shuffle by itself.

Opposition Agent

Powerful against tutors, but the value depends heavily on the opposing universe. It is not sufficiently universal to occupy a default slot without established metagame data.

Mindbreak Trap

Its free mode is unreliable against normal creature and midrange decks. Paying four mana and requiring double blue is not efficient enough.

Skithiryx, the Blight Dragon

The deck has no other infect cards, no proliferate and no dedicated power-increase package. Skithiryx would be an isolated alternative win condition rather than part of the deck's engine.

Doctor Octopus, Master Planner

The effect is powerful, but seven mana is too much for competitive 21-life play. Mysterio closes games earlier and has a much lower opportunity cost.

Behold the Sinister Six!

Seven mana and a stocked graveyard are excessive requirements. The deck is not a mass-reanimation deck.

Prison Break

Mayhem is attractive, but four or five mana for a single reanimation effect is too slow. Reanimate performs the same basic role for one mana.

Spider-Slayer, Hatred Honed

The anti-Spider text will frequently be irrelevant against other universes, while its graveyard ability costs six mana. Being a cheap Villain is not enough on its own.

Grendel, Spawn of Knull

A flying deathtouch body is respectable, but it does not generate cards, tempo, graveyard value or a meaningful tribal payoff. The four-mana slots are reserved for stronger engines.

Najeela Combat Cards

Savage Beating, Relentless Assault, Impact Tremors and Goblin Bombardment have all been removed. They belonged to a different commander and a different deck.

Validation

The completed list contains:

• Exactly 100 cards.
• Exactly one commander.
• 99 cards in the main deck.
• No singleton violations.
• Only blue, black and colourless cards.
• 41 lands.
• 24 Villains, including Prowler.
• No cards outside the official Spider-Man universe list.

All named printings and collector numbers appear in the official Spider-Man UAW card pool.

Confidence Level

I have high confidence in:

• Prowler as the most coherent two-colour competitive commander.
• The Dimir mana base.
• The cheap interaction package.
• Mysterio as the main payoff.
• Tombstone, Chameleon and the connive structure.
• Excluding Frantic Search and the unrelated Najeela packages.

The least certain slots are:

• Peter Parker's Camera.
• The Clone Saga.
• Merciless Enforcers.
• Fact or Fiction.
• The forty-first land.

Those cards are still functionally connected to the deck. Their exact value will depend on whether the emerging Universes at War metagame is faster, more controlling or more attritional than expected.

This is not claimed to be mathematically solved. It is the Spider-Man construction I currently consider the strongest combination of coherent strategy, mana consistency, interaction, resilience and closing power.