Bolas's Citadel + Bontu's Monument + Mortuary + Phantom Train

B identity

Commander legal

The 4 combo pieces

What must be in place

You control an additional nontoken creature with mana value 1 or less.

How to execute it

  1. Activate Phantom Train by sacrificing a creature with mana value 1 or less.
  2. When the creature dies, Mortuary triggers, putting the creature from your graveyard onto the top of your library.
  3. Resolve the Phantom Train ability.
  4. Cast the creature from the top of your library by paying 1 life.
  5. Bontu's Monument triggers, causing you to gain 1 life and each opponent to lose 1 life.
  6. Repeat.

What the combo produces