Sin, Unending Cataclysm, Verdant Succession, and Bloodthrone Vampire

Prerequisites

• Sin, Unending Cataclysm on the battlefield
• Verdant Succession on the battlefield
• Bloodthrone Vampire on the battlefield

Steps

1. Activate Bloodthrone Vampire by sacrificing Sin
2. When Sin dies, it and Verdant Succession trigger
3. Resolve the Sin trigger, moving any counters from it onto another creature you control, and then shuffling Sin into your library
4. Resolve the Verdant Succession trigger, searching your library for Sin and putting it onto the battlefield
5. Resolve the Bloodthrone Vampire ability
6. Repeat

Results

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