Acorn Catapult, Cacophodon, and Earthcraft

Prerequisites

• Acorn Catapult on the battlefield
• Cacophodon on the battlefield
• Earthcraft on the battlefield
• You have a way to give Cacophodon indestructible
• You control a basic land

Steps

1. Give Cacophodon indestructible by any method
2. Activate the basic land by tapping it to add
3. Activate Acorn Catapult by paying and tapping it, dealing 1 damage to Cacophodon and creating a 1/1 Squirrel token
4. Cacophodon triggers, untapping Acorn Catapult
5. Activate Earthcraft by tapping the Squirrel token, untapping the basic land
6. Repeat from step 2

Results

• Infinite ETB
• Infinite tapped creature tokens