Bolas's Citadel + Grinding Station + Mortuary + Phyrexian Walker

B identity

Commander legal

The 4 combo pieces

• Bolas's Citadel
• Grinding Station
• Mortuary
• Phyrexian Walker

How to execute it

1. Activate Grinding Station by tapping it and sacrificing Phyrexian Walker
2. When Phyrexian Walker dies, Mortuary triggers, putting Phyrexian Walker from your graveyard onto the top of your library.
3. Resolve the Grinding Station ability.
4. Cast Phyrexian Walker from the top of your library by paying 0 life.
5. When Phyrexian Walker enters, Grinding Station triggers, untapping Grinding Station.
6. Repeat.

What the combo produces

• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill
• Infinite storm count