Bolas's Citadel + Mortuary + Phyrexian Walker + Shilgengar, Sire of Famine

WB identity

Commander legal

The 4 combo pieces

How to execute it

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

What the combo produces