Mortuary, Bolas's Citadel, Ashnod's Altar, and Tarpan

Prerequisites

• Mortuary on the battlefield
• Bolas's Citadel on the battlefield
• Ashnod's Altar on the battlefield
• Tarpan in hand

Steps

1. Activate Ashnod's Altar by sacrificing Tarpan
2. When Tarpan dies, it and Mortuary triggers
3. Resolve the Mortuary trigger, putting Tarpan from your graveyard onto the top of your library
4. Resolve the Tarpan trigger, causing you to gain 1 life
5. Cast Tarpan from the top of your library by paying 1 life due to Bolas's Citadel
6. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite colorless mana
• Infinite storm count