Aetherflux Reservoir + Bolas's Citadel + Mortuary + Phyrexian Altar

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 Phyrexian Altar by sacrificing a creature.
  2. When the creature dies, Mortuary triggers, putting the creature from your graveyard onto the top of your library.
  3. Cast the creature from the top of your library by paying X life, where X is the creature's mana value.
  4. Aetherflux Reservoir triggers, causing you to gain 1 life for each spell you've cast this turn.
  5. Repeat.

What the combo produces