Errant and Giada, Mortuary, and Phyrexian Altar

Prerequisites

• Errant and Giada on the battlefield
• Mortuary on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing the creature with flash and/or flying, adding one mana of any color
2. When the creature dies, Mortuary triggers, putting the creature on top of your library from your graveyard
3. Cast the creature from the top of your library by paying its mana cost
4. Repeat

Results

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