Sin, Unending Cataclysm, Verdant Succession, and Ashnod's Altar

Prerequisites

• Sin, Unending Cataclysm on the battlefield
• Verdant Succession on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Activate Ashnod's Altar 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. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite colorless mana
• Infinite +1/+1 counters