Aetherflux Reservoir + Bolas's Citadel + Mortuary + Phantom Train

B identity

Commander legal

The 4 combo pieces

What must be in place

You control an additional nontoken creature.

How to execute it

  1. Activate Phantom Train by sacrificing a creature
  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 X life, where X is the creature's mana value.
  5. Aetherflux Reservoir triggers, causing you to gain 1 life for each spell you've cast this turn.
  6. Repeat.

What the combo produces