Super Mutant Scavenger, Kaya's Ghostform, and Phyrexian Altar

Prerequisites

• Super Mutant Scavenger on the battlefield
• Kaya's Ghostform on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Super Mutant Scavenger, adding
2. When Super Mutant Scavenger dies, it and Kaya's Ghostform trigger
3. Resolve the Super Mutant Scavenger trigger, allowing you to return any Aura or Equipment card from your graveyard to your hand
4. Resolve the Kaya's Ghostform trigger, returning Super Mutant Scavenger from your graveyard to the battlefield
5. When Super Mutant Scavenger enters the battlefield, it triggers, returning Kaya's Ghostform from your graveyard to your hand
6. Cast Kaya's Ghostform by paying , attaching it to Super Mutant Scavenger
7. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count