Ivy Lane Denizen + Phyrexian Altar

G identity

Commander legal

The 2 combo pieces

How to execute it

  1. Activate Phyrexian Altar by sacrificing the creature with persist, adding {1}.
  2. The persist ability triggers, returning that creature to the battlefield with a -1/-1 counter.
  3. Ivy Lane Denizen triggers, putting a +1/+1 counter on the persist creature.
  4. Repeat.

What the combo produces