Daru Spiritualist, Starlit Sanctum, and Lightning Greaves

Prerequisites

• Daru Spiritualist on the battlefield
• Starlit Sanctum on the battlefield
• Lightning Greaves on the battlefield
• available

Steps

1. Activate Lightning Greaves's equip ability by paying , targeting a creature that doesn't currently have Lightning Greaves attached
2. If the targeted creature was a Cleric, Daru Spiritualist triggers, causing itself to get +0/+2 until end of turn
3. Resolve the Lightning Greaves ability
4. Repeat an arbitrarily large number of times
5. Activate Starlit Sanctum's second ability by paying , tapping it and sacrificing Daru Spiritualist, causing you to gain life equal to Daru Spiritualist's toughness

Results

• Infinite lifegain