Earthcraft, and Spawning Grounds

Prerequisites

• Earthcraft on the battlefield
• Spawning Grounds on the battlefield
• Spawning Grounds is attached to a basic land you control

Steps

1. Activate the enchanted basic land by tapping it, creating a 5/5 green Beast creature token with trample
2. Activate Earthcraft by tapping an untapped creature you control, untapping the enchanted basic land
3. Repeat

Results

• Infinite ETB
• Infinite tapped creature tokens with trample