Dream Seizer + Mikaeus, the Unhallowed + Phyrexian Altar

B identity

Commander legal

The 3 combo pieces

How to execute it

  1. Activate Phyrexian Altar by sacrificing Dream Seizer.
  2. When Dream Seizer dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  3. When Dream Seizer enters the battlefield, it triggers, putting a -1/-1 counter on it.
  4. Repeat.

What the combo produces