Bolas's Citadel + Mortuary + Willow Geist + Yahenni, Undying Partisan

BG identity

Commander legal

The 4 combo pieces

How to execute it

  1. Activate Yahenni by sacrificing Willow Geist.
  2. When Willow Geist dies, it and Mortuary triggers.
  3. Resolve the Mortuary trigger, putting Willow Geist from your graveyard onto the top of your library.
  4. Resolve the Willow Geist trigger, causing you to gain 1 life
  5. Resolve the Yahenni ability.
  6. Cast Willow Geist from the top of your library by paying 1 life due to Bolas's Citadel.
  7. Repeat.

What the combo produces