Bolas's Citadel, Mortuary, Crimson Kobolds, and Phyrexian Altar

Prerequisites

• Bolas's Citadel on the battlefield
• Mortuary on the battlefield
• Crimson Kobolds in hand or in the library
• Phyrexian Altar on the battlefield

Steps

1. Cast Crimson Kobolds either from your hand or from the top of your library by paying
2. Activate Phyrexian Altar by sacrificing Crimson Kobolds, adding one mana of any color
3. When Crimson Kobolds dies, Mortuary triggers, putting Crimson Kobolds from your graveyard on top of your library
4. Repeat

Results

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