Nether Traitor, Phyrexian Altar, and Skeleton Crew

Prerequisites

• Nether Traitor in the graveyard
• Phyrexian Altar on the battlefield
• Skeleton Crew on the battlefield
• undefined

Steps

1. Activate Phyrexian Altar by sacrificing Nether Traitor, adding one mana of any color
2. Activate Phyrexian Altar by sacrificing another creature, adding
3. When the creature dies, Nether Traitor triggers, causing you to pay to return it from your graveyard to the battlefield
4. Skeleton Crew triggers, creating a creature token
5. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite colored mana
• Infinite sacrifice triggers
• Infinite death triggers