Malcolm, Keen-Eyed Navigator + Magmaw + Runed Stalactite + Chatterfang, Squirrel General

Malcolm, Keen-Eyed Navigator

Magmaw

Runed Stalactite

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 two Treasure tokens.
3. Activate a Treasure by tapping and sacrificing it, adding 1.
4. Repeat.

This clever loop turns Magmaw into a lethal cannon by rewriting creature types with Runed Stalactite so that every sacrifice feeds Malcolm, Keen-Eyed Navigator and Chatterfang, Squirrel General. When Magmaw flings a nonland permanent at your opponent, Malcolm's pirate-triggered ability floods the board with Treasure tokens, which Chatterfang doubles into an equally massive army of Squirrels. You can then feed those very same tokens right back into Magmaw to fuel the loop infinitely, dealing unbounded damage to opponents while generating endless sacrifice and death triggers.