Malcolm, Keen-Eyed Navigator + Magmaw + Xenograft + Chatterfang, Squirrel General

Malcolm, Keen-Eyed Navigator

Magmaw

Xenograft

Chatterfang, Squirrel General

How it works

1. Activate Magmaw by paying 1 and sacrificing another nonland permanent, dealing 1 damage to an opponent.
2. Malcolm triggers, creating a 1/1 Squirrel creature token and a Treasure token.
3. Activate a Treasure by tapping and sacrificing it, adding 1.
4. Repeat.

This loop turns a modest sacrifice engine into a lethal, self-sustaining engine by transforming your entire board into a swarm of honorary Pirates courtesy of Xenograft. Once Malcolm, Keen-Eyed Navigator recognizes Magmaw's damage as Pirate-born, every ping generates both a Treasure and a bonus Squirrel thanks to Chatterfang, Squirrel General's replacement effect. You then sacrifice the newly minted Treasure to pay for Magmaw's activation cost and repeat the cycle indefinitely, looping the same piece of mana to burn your opponents out of the game.