Malcolm, Keen-Eyed Navigator + Magmaw + Runed Stalactite + Primal Vigor

Malcolm, Keen-Eyed Navigator

Magmaw

Runed Stalactite

Primal Vigor

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 engine by using Runed Stalactite to grant Malcolm, Keen-Eyed Navigator the Pirate creature type, ensuring his damage-trigger fires whenever Magmaw deals its ping. Primal Vigor supercharges the setup by doubling the resulting tokens, yielding two Treasures for every single sacrifice instead of just one. You then tap and sacrifice one of those extra Treasure tokens to fund Magmaw's next activation while keeping the loop net-positive to steadily burn your opponents out of the game.