Retreat to Emeria, Haru, Hidden Talent, and Darigaaz's Caldera

Prerequisites

• Retreat to Emeria on the battlefield
• Haru, Hidden Talent on the battlefield
• Darigaaz's Caldera in hand

Steps

1. Play Darigaaz's Caldera
2. When Darigaaz's Caldera enters, it and Retreat to Emeria trigger
3. Resolve the Retreat to Emeria trigger, creating a 1/1 Kor Ally creature token
4. When the Kor Ally enters, Haru triggers, earthbending Darigaaz's Caldera
5. Resolve the Darigaaz's Caldera trigger from step 2, causing you to sacrifice it Haru triggers, returning Darigaaz's Caldera from your graveyard to the battlefield
6. Repeat from step 2

Results

• Infinite ETB
• Infinite lifegain triggers
• Infinite lifegain
• Infinite creature tokens
• Infinite landfall triggers