Mikaeus, the Unhallowed + Pith Driller + Yahenni, Undying Partisan

B identity

Commander legal

The 3 combo pieces

What must be in place

Pith Driller does not have a +1/+1 counter on it.

How to execute it

  1. Activate Yahenni by sacrifiicing Pith Driller.
  2. When Pith Driller dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  3. When Pith Driller enters the battlefield, it triggers, putting a -1/-1 counter on it.
  4. Resolve the Yahenni ability, giving it indestructible until end of turn.
  5. Repeat.

What the combo produces