Thornbite Staff, Grimgrin, Corpse-Born, and Bloodline Keeper // Lord of Lineage

Prerequisites

• Thornbite Staff on the battlefield
• Grimgrin, Corpse-Born on the battlefield
• Bloodline Keeper // Lord of Lineage on the battlefield

Steps

1. Activate Bloodline Keeper // Lord of Lineage by tapping it, creating a creature token
2. Activate Grimgrin by sacrificing the creature token
3. When the creature token dies, Bloodline Keeper // Lord of Lineage triggers due to its ability granted to it by Thornbite Staff, untapping Bloodline Keeper // Lord of Lineage
4. Resolve the Grimgrin ability, putting a +1/+1 counter on Grimgrin and untapping it Repeat

Results

• Infinite +1/+1 counters on a creature
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers