Retreat to Emeria, Haru, Hidden Talent, and Coastal Hornclaw

Prerequisites

• Retreat to Emeria on the battlefield
• Haru, Hidden Talent on the battlefield
• Coastal Hornclaw 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 Coastal Hornclaw 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 Coastal Hornclaw ability from step 4
9. Repeat from step 4

Results

• Infinite ETB
• Infinite creature tokens
• Infinite landfall triggers