Gutter Grime, Bloodsoaked Champion, and Phyrexian Altar

Prerequisites

• Gutter Grime on the battlefield
• Bloodsoaked Champion on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Bloodsoaked Champion, adding
2. When Bloodsoaked Champion dies, Gutter Grime triggers, putting a slime counter on it and creating an Ooze creature token
3. Activate Phyrexian Altar by sacrificing the Ooze, adding
4. Activate Bloodsoaked Champion by paying , return it from your graveyard to the battlefield
5. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinitely large creature