Malcolm, Keen-Eyed Navigator, Magmaw, Jolene, the Plunder Queen, and Amoeboid Changeling

Prerequisites

• Malcolm, Keen-Eyed Navigator on the battlefield
• Magmaw on the battlefield
• Jolene, the Plunder Queen on the battlefield
• Amoeboid Changeling on the battlefield
• available

Steps

1. Activate Amoeboid Changeling by tapping it, causing Magmaw to gain all creature types until end of turn
2. Activate Magmaw by paying 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
5. Repeat from step 2

Results

• Infinite damage