Oathsworn Vampire, Phyrexian Altar, and Fumulus, the Infestation

Prerequisites

• Oathsworn Vampire on the battlefield
• Phyrexian Altar on the battlefield
• Fumulus, the Infestation on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Oathsworn Vampire, adding
2. When Oathsworn Vampire dies, Fumulus triggers, creating a creature token
3. Activate Phyrexian Altar by sacrificing the creature token, adding
4. Cast Oathsworn Vampire from your graveyard by paying
5. Repeat

Results

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