Toph, the First Metalbender, Retreat to Emeria, Haru, Hidden Talent, and Dark Sphere

Prerequisites

• Toph, the First Metalbender on the battlefield
• Retreat to Emeria on the battlefield
• Haru, Hidden Talent on the battlefield
• Dark Sphere in hand

Steps

1. Cast Dark Sphere by paying its mana cost
2. When Dark Sphere enters, Retreat to Emeria triggers, creating a 1/1 Kor Ally creature token
3. When the Kor Ally enters, Haru triggers, earthbending Dark Sphere
4. Activate Dark Sphere by tapping and sacrificing it
5. Haru triggers, returning Dark Sphere from your graveyard to the battlefield
6. Repeat steps 2 and 3 once
7. Resolve the Dark Sphere ability from step 4
8. Repeat from step 4

Results

• Infinite ETB
• Infinite creature tokens
• Infinite landfall triggers