Bolas's Citadel + Mortuary + Ornithopter + Umbral Collar Zealot

B identity

Commander legal

The 4 combo pieces

• Bolas's Citadel
• Mortuary
• Ornithopter
• Umbral Collar Zealot

How to execute it

1. Activate Umbral Collar Zealot by sacrificing Ornithopter
2. When Ornithopter dies, Mortuary triggers, putting Ornithopter from your graveyard onto the top of your library.
3. Resolve the Umbral Collar Zealot ability.
4. Cast Ornithopter from the top of your library by paying 0 life.
5. Repeat.

What the combo produces

• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite sacrifice triggers
• Infinite storm count
• Infinite surveil