Malcolm, Keen-Eyed Navigator + Magmaw + Amoeboid Changeling + Elspeth, Storm Slayer

Malcolm, Keen-Eyed Navigator

Magmaw

Amoeboid Changeling

Elspeth, Storm Slayer

How it works

1. Activate Amoeboid Changeling by tapping it, causing Magmaw to gain all creature types until end of turn.
2. Activate Magmaw by paying 1 and sacrificing another nonland permanent, dealing 1 damage to an opponent.
3. Malcolm triggers, creating two Treasure tokens.
4. Activate a Treasure by tapping and sacrificing it, adding 1.
5. Repeat from step 2.

This clever loop uses Amoeboid Changeling to turn Magmaw into a Pirate, allowing Magmaw's own activated sacrifice ability to trigger Malcolm, Keen-Eyed Navigator whenever it deals damage to an opponent. Because Elspeth, Storm Slayer doubles every token generated under your control, Malcolm's trigger yields two Treasure tokens instead of one. Sacrificing one of those Treasures fuels Magmaw's activation cost while leaving the other behind as fodder for the next iteration, letting you easily machine-gun down the table for infinite damage.