Every Commander archetype is a promise: build the deck this way and the games will feel like this. The Poison archetype makes its promise th...
Every Commander archetype is a promise: build the deck this way and the games will feel like this. The Poison archetype makes its promise through a specific package of cards and a specific way of spending its turns. It wins on a second life total: ten poison counters, delivered by small deathtouch creatures, proliferate, or a single well-timed pump.
The cards that define it
Fynn, the Fangbearer — Legendary Creature — Human Warrior (mana cost {1}{G}):
Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
Whenever a creature you control with deathtouch deals combat damage to a player, that player gets two poison counters. (A player with ten or more poison counters loses the game.)
Venerated Rotpriest — Creature — Phyrexian Druid (mana cost {G}):
Toxic 1 (Players dealt combat damage by this creature also get a poison counter.)
Whenever a creature you control becomes the target of a spell, target opponent gets a poison counter.
Cards like these are the archetype in miniature — the effects the whole deck is organised around. Browse their exact text in the MTGBrew card database before you build; archetypes are won and lost on oracle text read carefully.
How the deck wins
Poison decks win by doing their ordinary thing relentlessly. The early game is development: lands, ramp, and the cheap pieces of the package. The mid-game is where the package starts paying for itself — each card making the next one better, until the table has to answer the engine instead of developing its own. The closing turns are rarely fancy; an archetype that has done its ordinary thing for six straight turns usually wins by accumulation, and the finisher is whichever piece the opponents could not answer in time.
Build the list with the MTGBrew AI deck builder: state your budget first — the builder treats it as a hard rule — and let the archetype's core packages fill in before the flex slots argue for themselves.
If this topic is on your bench, keep going with Gemstone Mine in Commander: The Land Slot That Quietly Fixes Games — it covers the neighbouring decisions from a different angle, and the two pieces together give you a fuller picture than either one alone.
Where it struggles
Every archetype has a tax. For Poison, the tax is paid in the turns before the package assembles: pack enough interaction to survive those turns, enough card flow to find the pieces, and the discipline to cut the cards that only shine once the deck is already winning. Those support slots are unglamorous, and they are the difference between an archetype deck and a pile of themed cards.
Keep reading
Keep reading: Gemstone Mine in Commander: The Land Slot That Quietly Fixes Games and Ramos, Dragon Engine Commander Guide: How the Deck Actually Wins.
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