Malcolm, Keen-Eyed Navigator + Magmaw + Amoeboid Changeling + Doubling Season

Malcolm, Keen-Eyed Navigator

Magmaw

Amoeboid Changeling

Doubling Season

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 turns Magmaw into an honorary Pirate with the help of Amoeboid Changeling's changeling ability, allowing its sacrifice-driven damage to trigger Malcolm, Keen-Eyed Navigator. Whenever Magmaw hurls a permanent at an opponent, Malcolm floods your board with Treasure tokens, a bounty that Doubling Season amplifies into a surplus large enough to fuel the entire engine infinitely.