Mortuary, Krark-Clan Ironworks, Phyrexian Walker, and Bolas's Citadel

Prerequisites

• Mortuary on the battlefield
• Krark-Clan Ironworks on the battlefield
• Phyrexian Walker on the battlefield
• Bolas's Citadel on the battlefield

Steps

1. Activate Krark-Clan Ironworks by sacrificing Phyrexian Walker When Phyrexian Walker dies, Mortuary triggers, putting Phyrexian Walker from your graveyard onto the top of your library
2. Cast Phyrexian Walker from the top of your library by paying 0 life
3. Repeat

Results

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