The Master, Formed Anew + Phyrexian Altar

The Master, Formed Anew

Phyrexian Altar

How it works

1. Activate Phyrexian Altar by sacrificing The Master, adding one mana of any color.
2. When The Master dies, if it was a copy of the undying creature, its undying ability triggers, returning it from your graveyard to the battlefield as a copy of the persist creature with a +1/+1 counter on it.
3. Otherwise, if The Master was a copy of the persist creature, its persist ability triggers, returning it from your graveyard to the battlefield as a copy of the undying creature with a -1/-1 counter on it.
4. Repeat.