Bolas's Citadel + Mortuary + Ornithopter + Phantom Train

B identity

Commander legal

The 4 combo pieces

• Bolas's Citadel
• Mortuary
• Ornithopter
• Phantom Train

How to execute it

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

What the combo produces

• Infinite +1/+1 counters on a creature
• Infinite creature LTB
• Infinite death triggers
• Infinite ETB
• Infinite sacrifice triggers
• Infinite storm count