Thran Vigil + Twilight Shepherd + Yahenni, Undying Partisan

WB identity

Commander legal

The 3 combo pieces

How to execute it

  1. Activate Yahenni by sacrificing Twilight Shepherd.
  2. When Twilight Shepherd dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  3. Thran Vigil triggers, putting a +1/+1 counter on Twilight Shepherd.
  4. Resolve the Yahenni ability.
  5. Repeat.

What the combo produces