Malcolm, Keen-Eyed Navigator + Magmaw + Runed Stalactite + Worldwalker Helm

Malcolm, Keen-Eyed Navigator

Magmaw

Runed Stalactite

Worldwalker Helm

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 Map and a Treasure token.
3. Activate a Treasure by tapping and sacrificing it, adding 1.
4. Repeat.

This clever loop turns Magmaw into a lethal artillery piece by leveraging Runed Stalactite to ensure Magmaw counts as a Pirate, triggering Malcolm, Keen-Eyed Navigator's ability whenever it deals damage to an opponent. Worldwalker Helm supercharges this creation phase by appending an extra Map token to every Treasure token Malcolm generates, providing a steady stream of sacrificial fodder. By cycling those newly minted tokens right back into Magmaw to pay its activation cost, you deal continuous damage and sustain an infinite loop of destruction.