Toph, the First Metalbender, Haru, Hidden Talent, Zuran Orb, and Arcane Adaptation

Prerequisites

• Toph, the First Metalbender on the battlefield
• Haru, Hidden Talent on the battlefield
• Zuran Orb on the battlefield
• Arcane Adaptation on the battlefield

Steps

1. Cast any artifact creature by paying its mana cost
2. When the artifact creature enters as an Ally due to Arcane Adaptation, Haru triggers, earthbending the artifact creature, as it's a land due to Toph
3. Activate Zuran Orb by sacrificing the artifact creature
4. When the creature dies, Haru triggers, returning the creature from your graveyard to the battlefield
5. When the creature enters as an Ally due to Arcane Adaptation, Haru triggers, earthbending the creature, as it's a land due to Toph
6. Resolve the Zuran Orb ability, causing you to gain 2 life
7. Repeat from step 3

Results

• Infinite artifact ETB
• Infinite artifact LTB
• Infinite artifact sacrifice triggers
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite landfall triggers
• Infinite lifegain
• Infinite lifegain triggers