Malcolm, Keen-Eyed Navigator + Magmaw + Unnatural Selection + Worldwalker Helm

Malcolm, Keen-Eyed Navigator

Magmaw

Unnatural Selection

Worldwalker Helm

How it works

1. Activate Unnatural Selection by paying 1, causing Magmaw to become a Pirate 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 a Map and a Treasure token.
4. Activate a Treasure by tapping and sacrificing it, adding 1.
5. Repeat from step 2.

This clever loop transforms your battlefield into a lethal engine by manipulating creature types with Unnatural Selection, turning the unassuming Magmaw into an honorary Pirate. Once Magmaw gains that creature type, its own ability to sacrifice permanents and deal damage triggers Malcolm, Keen-Eyed Navigator to generate a Treasure token. Thanks to Worldwalker Helm's replacement effect, every time that Treasure is created, you also receive an extra Map token, easily fueling the sacrifice loop while Magmaw converts the resulting damage into an infinite-range win condition.