Tarrian's Soulcleaver, Scurry Oak, and Bloodthrone Vampire

Prerequisites

• Tarrian's Soulcleaver on the battlefield
• Scurry Oak on the battlefield
• Bloodthrone Vampire on the battlefield

Steps

1. Put a +1/+1 counter on Scurry Oak
2. Scurry Oak triggers, creating a 1/1 Squirrel creature token
3. Activate Bloodthrone Vampire by sacrificing the Squirrel
4. When the Squirrel dies, Tarrian's Soulcleaver triggers, putting a +1/+1 counter on Scurry Oak
5. Scurry Oak triggers, creating a 1/1 Squirrel creature token
6. Resolve the Bloodthrone Vampire ability Repeat from step 3

Results

• Infinite +1/+1 counters on a creature
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinitely large creature until end of turn