Prowling Geistcatcher, Phyrexian Delver, Gray Merchant of Asphodel, and Blasting Station

Prerequisites

• Prowling Geistcatcher on the battlefield
• Phyrexian Delver in exile
• Gray Merchant of Asphodel in exile
• Blasting Station on the battlefield
• undefined

Steps

1. Activate Blasting Station by tapping it and sacrificing Prowling Geistcatcher
2. When Prowling Geistcatcher dies, its second ability triggers, returning Phyrexian Delver and Gray Merchant from exile to the battlefield
3. When Phyrexian Delver and Gray Merchant enter the battlefield, they trigger and Blasting Station triggers twice
4. 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
5. Resolve the Phyrexian Delver trigger, causing you to return Prowling Geistcatcher from your graveyard to the battlefield and lose 4 life
6. When Prowling Geistcatcher enters the battlefield, Blasting Station triggers, untapping Blasting Station
7. Holding priority, activate Blasting Station by tapping it and sacrificing Phyrexian Delver
8. When Phyrexian Delver dies, Prowling Geistcatcher's first ability triggers, exiling Phyrexian Delver from your graveyard
9. Resolve the Blasting Station ability from step 7, dealing 1 damage to any target
10. Resolve a Blasting Station trigger from step 3, untapping it
11. Holding priority, repeat steps 7 through 10 one time, sacrificing Gray Merchant instead
12. Resolve the Blasting Station ability from step 1
13. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite damage
• Infinite lifegain triggers
• Infinite lifegain
• Infinite lifeloss