Bolas's Citadel + Crookshank Kobolds + Mortuary + Umbral Collar Zealot

BR identity

Commander legal

The 4 combo pieces

• Bolas's Citadel
• Crookshank Kobolds
• Mortuary
• Umbral Collar Zealot

How to execute it

1. Activate Umbral Collar Zealot by sacrificing Crookshank Kobolds
2. When Crookshank Kobolds dies, Mortuary triggers, putting Crookshank Kobolds from your graveyard onto the top of your library.
3. Resolve the Umbral Collar Zealot ability.
4. Cast Crookshank Kobolds 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