Colfenor, the Last Yew, Gutter Grime, and Hammerhead, Maggia Boss

Prerequisites

• Colfenor, the Last Yew on the battlefield
• Gutter Grime on the battlefield
• Hammerhead, Maggia Boss on the battlefield

Steps

1. Cast the creature card in your hand by paying
2. Either that creature dies as a state-based action due to having zero toughness, or activate Hammerhead by sacrificing that creature
3. Gutter Grime triggers, putting a slime counter on it and creating a X/X Ooze creature token
4. Activate Hammerhead by sacrificing the Ooze
5. When the Ooze dies, Colfenor triggers, returning the creature card from your graveyard to your hand
6. If the Hammerhead ability is not a mana ability, resolve those abilities now
7. Repeat

Results

• Infinite +1/+1 counters on a creature
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite creature tokens that are infinitely large
• Infinite death triggers
• Infinite storm count