Legendary Creature — Vampire Assassin

Mari, the Killing Quill

Mana value3EDHREC#2,330

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The Commander

Whenever a creature an opponent controls dies, exile it with a hit counter on it.

Assassins, Mercenaries, and Rogues you control have deathtouch and "Whenever this creature deals combat damage to a player, you may remove a hit counter from a card that player owns in exile. If you do, draw a card and create two Treasure tokens."

Guide

Gameplan

Mari turns opponents' dying creatures into a stockpile of exiled cards loaded with hit counters, then connects with cheap evasive Assassins, Mercenaries, and Rogues to convert those counters into cards and Treasure. You grind value every combat, ramp explosively off Treasure, and snowball into a mono-black control-aristocrats engine that buries the table in advantage.

Strengths

Built-in card advantage and Treasure ramp that scales with how many creatures die at the table
Free deathtouch on a whole tribe makes attacks and blocks lopsided
Mono-black gives access to powerful tutors and recursion to assemble engines reliably
Punishes board wipes and aristocrats decks by harvesting every dying creature

Weaknesses

Engine stalls badly if you can't connect with combat damage—needs evasion enablers
Heavy reliance on the commander; repeated removal slows the whole plan
Vulnerable to graveyard/exile hate and counter-removal effects
Slow against fast combo decks since value accrues over multiple turns

Key Cards

Anowon, the Ruin Thief — A Rogue payoff that mills and draws while feeding Mari's combat-damage trigger with evasion synergy.
Coat of Arms — Pumps your wide Assassin/Rogue tribe so connecting and applying pressure becomes trivial.
Nightmare Shepherd — Adds another layer of value as opponents' creatures die while you reuse your own.
Whispersilk Cloak — Grants unblockable to guarantee Mari or a key creature lands the hit-counter payoff.
Bontu's Monument — Cost reduction plus drain that supports a flood of cheap evasive tribal threats.
Black Market Connections — Generates Treasure, creatures, and cards to fuel the Treasure-hungry, tribe-wide gameplan.

Upgrade Path

Add fast mana (Dark Ritual, Jet Medallion) and tutors (Demonic Tutor, Vampiric Tutor) to find evasion enablers and finishers faster. Lean into unblockable effects and anthem tribal pieces so combat connects reliably, then cap with a Treasure-fueled X-spell like Torment of Hailfire as a deterministic win. Cut clunky high-cost cards for cheap evasive Rogues and counter-payoff redundancy to tighten the engine.

Core Cards

The most-played cards for this commander, built from aggregated deck data (the Mythic Graph). Build public decks to seed it.

Win Conditions

▸Wide tribal beatdown with deathtouch making blocks suicidal
▸Repeated card advantage and Treasure fueling a finisher like Torment of Hailfire or Exsanguinate
▸Death-trigger drain effects (Blood Artist, Bastion of Remembrance) grinding life totals down
▸Treasure-powered big mana into an X-spell or game-ending bomb

Archetypes

Aristocrats — Mari exiles every opponent creature that dies, so sacrifice-fueled tables only feed her counters.
Tribal (Assassins/Rogues/Mercenaries) — She grants the whole tribe deathtouch and a combat-damage card-and-Treasure engine.
Control — Mono-black removal plus repeatable card draw and Treasure lets you grind opponents out.
Combo — Treasure generation and card draw enable explosive turns with mana-sink and storm-style payoffs.