Oathsworn Vampire, Phyrexian Altar, and Phenomenon Investigators

Prerequisites

• Oathsworn Vampire on the battlefield
• Phyrexian Altar on the battlefield
• Phenomenon Investigators on the battlefield

Steps

1. Activate Phyrexian Altar by sacrificing Oathsworn Vampire, adding
2. When Oathsworn Vampire dies, Phenomenon Investigators 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 LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite storm count