Colfenor, the Last Yew, Gutter Grime, and Carrion Feeder

Prerequisites

• Colfenor, the Last Yew on the battlefield
• Gutter Grime on the battlefield
• Carrion Feeder 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 Carrion Feeder by sacrificing that creature
3. Gutter Grime triggers, putting a slime counter on it and creating a X/X Ooze creature token
4. Activate Carrion Feeder by sacrificing the Ooze
5. When the Ooze dies, Colfenor triggers, returning the creature card from your graveyard to your hand
6. Resolve the Carrion Feeder abilities, putting a +1/+1 counter on it each time
7. Repeat

Results

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