First Day of Class, and Hammerhead, Maggia Boss

Prerequisites

• First Day of Class in hand
• Hammerhead, Maggia Boss on the battlefield
• available

Steps

1. Cast First Day of Class by paying , creating a delayed triggered ability
2. Activate Hammerhead by sacrificing the persist creature
3. When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
4. When the persist creature enters, First Day of Class triggers, putting a +1/+1 counter on that creature
5. Resolve the Hammerhead ability
6. Repeat

Results

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