Glissa, the Traitor, Grave Pact, Phyrexian Altar, and Cathodion

Prerequisites

• Glissa, the Traitor on the battlefield
• Grave Pact on the battlefield
• Phyrexian Altar on the battlefield
• Cathodion on the battlefield

Steps

1. Sacrifice Cathodion to Phyrexian Altar, adding one mana of any color
2. Cathodion and Grave Pact trigger
3. Resolve Cathodion's trigger, adding
4. Resolve Grave Pact's trigger, causing each opponent to sacrifice a creature
5. Glissa triggers at least once, allowing you to return Cathodion to your hand
6. Cast Cathodion by paying
7. Repeat until your opponents no longer control any creatures

Results

• Near-infinite colored mana
• Near-infinite death triggers
• Near-infinite ETB
• Near-infinite LTB
• Near-infinite sacrifice triggers
• Near-infinite storm count
• Opponents sacrifice all their creatures every turn