Retreat to Emeria, Haru, Hidden Talent, and Thaumatog

Prerequisites

• Retreat to Emeria on the battlefield
• Haru, Hidden Talent on the battlefield
• Thaumatog on the battlefield

Steps

1. Play a land
2. When the land enters, Retreat to Emeria triggers, creating a 1/1 Kor Ally creature token
3. When the Kor Ally enters, Haru triggers, earthbending the land that entered
4. Activate Thaumatog by sacrificing the earthbended land
5. Haru triggers, returning the land from your graveyard to the battlefield tapped
6. When the land enters, Retreat to Emeria triggers, creating a 1/1 Kor Ally creature token
7. When the Kor Ally enters, Haru triggers, earthbending the land that entered
8. Resolve the Thaumatog ability from step 4
9. Repeat from step 4

Results

• Infinite ETB
• Infinite creature tokens
• Infinite landfall triggers
• Infinitely large Thaumatog until end of turn