Urza, Prince of Kroog, Training Grounds, Mycosynth Lattice, and Earthcraft

Prerequisites

• Urza, Prince of Kroog on the battlefield
• Training Grounds on the battlefield
• Mycosynth Lattice on the battlefield
• Earthcraft on the battlefield
• undefined available

Steps

1. Activate the basic land by tapping it, adding
2. Activate Urza by paying , creating a token copy of Training Grounds that is a 1/1 Soldier in addition to its other types
3. Activate Earthcraft by tapping the Training Grounds token, untapping a basic land
4. Activate the basic land by tapping it, adding
5. Activate Urza by paying , creating a token copy of Training Grounds that is a 1/1 Soldier in addition to its other types
6. Activate Earthcraft by tapping the Training Grounds token, untapping a basic land
7. Activate the basic land by tapping it, adding
8. Activate Urza by paying , creating a token copy of Training Grounds that is a 1/1 Soldier in addition to its other types
9. Repeat from step 6

Results

• Infinite ETB
• Infinite tapped creature tokens