Acorn Catapult + Cacophodon + Phyrexian Altar

Prerequisites

• You have a way to give Cacophodon indestructible.

Steps

1. 1Give Cacophodon indestructible by any method.
2. 2Activate Acorn Catapult by paying and tapping it, dealing 1 damage to Cacophodon and creating a 1/1 Squirrel token.
3. 3Cacophodon triggers, untapping Acorn Catapult.
4. 4Activate Phyrexian Altar by sacrificing the Squirrel token, adding .
5. 5Repeat from step 2.

Effects

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers