Malcolm, Keen-Eyed Navigator + Magmaw + Unnatural Selection + Elspeth, Storm Slayer

Malcolm, Keen-Eyed Navigator

Magmaw

Unnatural Selection

Elspeth, Storm Slayer

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 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 crew member by using Unnatural Selection to continuously rewrite its creature type to Pirate. Once Magmaw holds that pirate status, dealing damage to an opponent via its own sacrifice ability triggers Malcolm, Keen-Eyed Navigator to generate treasure tokens. This token generation is doubled by Elspeth, Storm Slayer's static replacement effect, ensuring you always create more than enough resources to fund Magmaw and repeat the loop indefinitely.