Naru Meha, Master Wizard, Yahenni, Undying Partisan, and Return Upon the Tide

Prerequisites

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

Steps

1. Cast Return Upon the Tide by paying its mana cost
2. Holding priority, cast Naru Meha by paying its mana cost
3. When Naru Meha enters, it triggers, targeting Return Upon the Tide
4. Holding priority, activate Yahenni by sacrificing Naru Meha, Resolve the Naru Meha trigger, copying Return Upon the Tide Resolve the Return Upon the Tide copy, returning Naru Meha from your graveyard to the battlefield
5. Repeat from step 3

Results

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