Mikaeus, the Unhallowed + Phyrexian Altar + Pith Driller

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 Phyrexian Altar by sacrifiicing Pith Driller, adding one mana of any color.
  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. Repeat.

What the combo produces