Kodama of the East Tree, Izzet Boilerworks, and Down in the Valley

Prerequisites

• Kodama of the East Tree on the battlefield
• Izzet Boilerworks in hand
• Down in the Valley on the battlefield

Steps

1. Play Izzet Boilerworks
2. When Izzet Boilerworks enters the battlefield, it, Down in the Valley, and Kodama of the East Tree trigger
3. Resolve the Kodama of the East Tree trigger, choosing not to put anything from your hand onto the battlefield
4. Resolve the Izzet Boilerworks trigger, returning it from the battlefield to your hand
5. Resolve the Down in the Valley trigger, creating a token
6. When the token enters the battlefield, Kodama of the East Tree triggers, putting Izzet Boilerworks from your hand onto the battlefield
7. When Izzet Boilerworks enters the battlefield, it and Down in the Valley trigger
8. Repeat from step 4

Results

• Infinite ETB
• Infinite creature tokens
• Infinite landfall triggers