Bolas's Citadel + Mortuary + Phyrexian Altar + Phyrexian Walker

B identity

Commander legal

The 4 combo pieces

• Bolas's Citadel
• Mortuary
• Phyrexian Altar
• Phyrexian Walker

How to execute it

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

What the combo produces

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