Bolas's Citadel + Mortuary + Phyrexian Walker + Yahenni, Undying Partisan

B identity

Commander legal

The 4 combo pieces

How to execute it

  1. Activate Yahenni 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 Yahenni ability.
  4. Cast Phyrexian Walker from the top of your library by paying 0 life.
  5. Repeat.

What the combo produces