Bolas's Citadel + Extruder + Mortuary + Shield Sphere

B identity

Commander legal

The 4 combo pieces

• Bolas's Citadel
• Extruder
• Mortuary
• Shield Sphere

How to execute it

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

What the combo produces

• Infinite +1/+1 counters on creatures you control
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite sacrifice triggers
• Infinite storm count