Naru Meha, Master Wizard, Fearsome Awakening, and Yahenni, Undying Partisan

Prerequisites

• Naru Meha, Master Wizard in hand
• Fearsome Awakening in hand
• Yahenni, Undying Partisan on the battlefield
• available

Steps

1. Cast Fearsome Awakening by paying its mana cost
2. Holding priority, cast Naru Meha by paying its mana cost
3. When Naru Meha enters, it triggers, targeting Fearsome Awakening
4. Holding priority, activate Yahenni by sacrificing Naru Meha, Resolve the Naru Meha trigger, copying Fearsome Awakening Resolve the Fearsome Awakening 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