Daru Spiritualist, Animal Boneyard, and Soltari Guerrillas

Prerequisites

• Daru Spiritualist on the battlefield
• Animal Boneyard on the battlefield
• Soltari Guerrillas on the battlefield

Steps

1. Activate Soltari Guerrillas by paying , targeting Daru Spiritualist
2. Daru Spiritualist triggers, giving it +0/+2 until end of turn
3. Repeat an arbitrarily large number of times
4. Activate the land with Animal Boneyard attached by tapping it and sacrificing Daru Spiritualist, causing you to gain life equal to Daru Spiritualist's toughness

Results

• Infinite lifegain