Naru Meha, Master Wizard, Makeshift Mannequin, and Bloodflow Connoisseur

Prerequisites

• Naru Meha, Master Wizard in hand
• Makeshift Mannequin in hand
• Bloodflow Connoisseur on the battlefield
• available

Steps

1. Cast Makeshift Mannequin by paying its mana cost
2. Holding priority, cast Naru Meha by paying its mana cost
3. When Naru Meha enters, it triggers, targeting Makeshift Mannequin
4. Holding priority, activate Bloodflow Connoisseur by sacrificing Naru Meha, putting a +1/+1 counter on Bloodflow Connoisseur
5. Resolve the Naru Meha trigger, copying Makeshift Mannequin Resolve the Makeshift Mannequin copy, returning Naru Meha from your graveyard to the battlefield
6. Repeat from step 3

Results

• Infinite +1/+1 counters on a creature
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite magecraft triggers