Phyrexian Altar + Solemnity

W identity

Commander legal

The 2 combo pieces

What must be in place

If a persist creature is used, it does not have a -1/-1 counter on it. Otherwise, if an undying creature is used, it does not have a +1/+1 counter on it.

How to execute it

  1. Activate Phyrexian Altar by sacrificing the persist or undying creature, adding one mana of any color.
  2. When the creature dies, its persist or undying ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter or a +1/+1 counter on it due to Solemnity.
  3. Resolve the Phyrexian Altar ability.
  4. Repeat.

What the combo produces