Naru Meha, Master Wizard, Grimgrin, Corpse-Born, and Dose of Dawnglow

Prerequisites

• Naru Meha, Master Wizard in hand
• Grimgrin, Corpse-Born on the battlefield
• Dose of Dawnglow in hand
• available

Steps

1. Cast Dose of Dawnglow by paying its mana cost
2. Holding priority, cast Naru Meha by paying its mana cost
3. When Naru Meha enters, it triggers, targeting Dose of Dawnglow
4. Holding priority, activate Grimgrin by sacrificing Naru Meha, putting a +1/+1 counter on Grimgrin and untapping it
5. Resolve the Naru Meha trigger, copying Dose of Dawnglow Resolve the Dose of Dawnglow 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