Cloudstone Curio, Xenagos, the Reveler, and Wrenn and Six

Prerequisites

• Cloudstone Curio on the battlefield
• Xenagos, the Reveler on the battlefield
• Wrenn and Six in hand
• You control at least seven creatures

Steps

1. Activate Xenagos's first ability by putting a loyalty counter on it, adding at least
2. Cast Wrenn and Six by paying
3. Wrenn and Six enters the battlefield, triggering Cloudstone Curio, returning Xenagos from the battlefield to your hand
4. Activate Wrenn and Six's second ability by removing a loyalty counter from it, dealing 1 damage to any target
5. Cast Xenagos by paying
6. Xenagos enters the battlefield, triggering Cloudstone Curio, returning Wrenn and Six from the battlefield to your hand
7. Repeat
8. Once you have infinite mana, you may instead activate Xenagos' second ability to get infinite creature tokens

Results

• Infinite creature tokens
• Infinite damage
• Infinite ETB
• Infinite green mana
• Infinite red mana