Thunderbolts Conspiracy, Solemnity, and Grimgrin, Corpse-Born

Prerequisites

• Thunderbolts Conspiracy on the battlefield
• Solemnity on the battlefield
• Grimgrin, Corpse-Born on the battlefield

Steps

1. Activate Grimgrin by sacrificing a Villain without a finality counter on it
2. When the Villain dies, Thunderbolts Conspiracy triggers, returning it from your graveyard to the battlefield without a finality counter on it due to Solemnity
3. Resolve the Grimgrin ability
4. Repeat

Results

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