Return to Action, Naru Meha, Master Wizard, and Yahenni, Undying Partisan

Prerequisites

• Return to Action in hand
• Naru Meha, Master Wizard in hand
• Yahenni, Undying Partisan on the battlefield
• available

Steps

1. Cast Return to Action by paying its mana cost
2. Holding priority, cast Naru Meha by paying its mana cost
3. When Naru Meha enters, it triggers, copying Return to Action, with the copy targeting Naru Meha
4. Resolve the copy of Return to Action
5. Holding priority, activate Yahenni by sacrificing Naru Meha
6. When Naru Meha dies, it triggers, returning it from your graveyard to the battlefield
7. Repeat from step 3
8. Resolve all Yahenni abilities from step 5

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite magecraft triggers