Bloodspore Thrinax, and Bloodthrone Vampire

Prerequisites

• Bloodspore Thrinax on the battlefield
• Bloodthrone Vampire on the battlefield

Steps

1. Activate Bloodthrone Vampire by sacrificing the persist creature
2. When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it and at least one +1/+1 counter on it due to Bloodspore Thrinax
3. Remove a -1/-1 counter and a +1/+1 counter from that creature as a state-based action
4. Resolve the Bloodthrone Vampire ability
5. Repeat

Results

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinitely large creature until end of turn