Teval, the Balanced Scale, Extractor Demon, Ashnod's Altar, and Hoverstone Pilgrim

Prerequisites

• Teval, the Balanced Scale on the battlefield
• Extractor Demon on the battlefield
• Ashnod's Altar on the battlefield
• Hoverstone Pilgrim on the battlefield

Steps

1. Activate Ashnod's Altar by sacrificing another creature, adding
2. When the creature dies, Extractor Demon triggers, causing you to mill two cards if your graveyard is empty, or causing an opponent to mill two cards otherwise
3. If your library is empty, activate Hoverstone Pilgrim by paying , putting a card from your graveyard onto the bottom of your library
4. Teval triggers, creating a 2/2 Zombie Druid creature token
5. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite mill
• Infinite self-mill
• Near-infinite colorless mana