Blightbeetle, Grimgrin, Corpse-Born, and Wrong Turn

Prerequisites

• Blightbeetle on the battlefield
• Grimgrin, Corpse-Born on the battlefield
• Wrong Turn in hand
• available

Steps

1. Use Wrong Turn to give Blightbeetle to an opponent Activate Grimgrin by sacrificing the undying creature
2. When the undying creature dies, its undying ability triggers, returning itself from your graveyard to the battlefield without a +1/+1 counter on it due to Blightbeetle
3. Resolve the Grimgrin ability
4. Repeat from step 2

Results

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