Priest of Forgotten Gods, Thornbite Staff, Gravecrawler, and Quintorius, Field Historian

Prerequisites

• Priest of Forgotten Gods on the battlefield
• Thornbite Staff on the battlefield
• Gravecrawler on the battlefield
• Quintorius, Field Historian on the battlefield
• Thornbite Staff attached to Priest of Forgotten Gods
• Priest of Forgotten Gods does not have summoning sickness
• You control at least one Zombie, and at least one additional creature except Gravecrawler or the Zombie

Steps

1. Activate Priest of Forgotten Gods by tapping it and sacrificing Gravecrawler and any other creature
2. When the creatures die, Priest of Forgotten Gods triggers twice, untapping itself
3. Resolve the Priest of Forgotten Gods ability, causing any number of opponents to sacrifice a creature and lose 2 life, and causing you to add and draw a card
4. Cast Gravecrawler from your graveyard by paying
5. Quintorius triggers, creating a 3/2 Spirit creature token
6. Repeat

Results

• Infinite card draw
• Near-infinite lifeloss
• Near-infinite ETB
• Infinite draw triggers
• Near-infinite LTB
• Near-infinite death triggers
• Near-infinite sacrifice triggers
• Near-infinite black mana