Malcolm, Keen-Eyed Navigator, Magmaw, Worldwalker Helm, and Amorphous Axe

Prerequisites

• Malcolm, Keen-Eyed Navigator on the battlefield
• Magmaw on the battlefield
• Worldwalker Helm on the battlefield
• Amorphous Axe on the battlefield
• available

Steps

1. Activate Magmaw by paying 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
4. Repeat

Results

• Infinite damage