Malcolm, Keen-Eyed Navigator, Maskwood Nexus, and Mayhem Devil

Prerequisites

• Malcolm, Keen-Eyed Navigator on the battlefield
• Maskwood Nexus on the battlefield
• Mayhem Devil on the battlefield
• You control at least one Treasure token

Steps

1. Activate a Treasure token by tapping and sacrificing it, adding one mana of any color
2. Mayhem Devil triggers, dealing 1 damage to any target opponent
3. Malcolm triggers, creating a Treasure token
4. Repeat

Results

• Infinite damage
• Infinite sacrifice triggers