Prowling Geistcatcher, Phyrexian Delver, Gray Merchant of Asphodel, and Carrion Feeder

Prerequisites

• Prowling Geistcatcher on the battlefield
• Phyrexian Delver on the battlefield
• Gray Merchant of Asphodel on the battlefield
• Carrion Feeder on the battlefield
• undefined

Steps

1. Activate Carrion Feeder twice by sacrificing Phyrexian Delver and Gray Merchant
2. When Phyrexian Delver and Gray Merchant die, Prowling Geistcatcher's first ability triggers twice, exiling Phyrexian Delver and Gray Merchant from your graveyard
3. Activate Carrion Feeder by sacrificing Prowling Geistcatcher
4. When Prowling Geistcatcher dies, its second ability triggers, returning Phyrexian Delver and Gray Merchant from exile to the battlefield
5. When Phyrexian Delver and Gray Merchant enter the battlefield, they trigger
6. Resolve the Gray Merchant trigger, causing each opponent to lose an amount of life equal to your devotion to black, and causing you to gain life equal to the life lost this way
7. Resolve the Phyrexian Delver trigger, causing you to return Prowling Geistcatcher from your graveyard to the battlefield and lose 4 life
8. Resolve the Carrion Feeder abilities from steps 1 and 3
9. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite lifegain triggers
• Infinite lifegain
• Infinite lifeloss
• Infinite +1/+1 counters on Carrion Feeder