All permanents on the battlefield (Moritte of the Frost as a copy of the creature with persist.).
Steps
Activate Ashnod's Altar by sacrificing Moritte of the Frost, adding ({C} magic symbol) ({C} magic symbol) .
When Moritte of the Frost dies, it triggers its persist ability, returning itself to the battlefield as a copy of the creature with persist with two +1/+1 counters and one -1/-1 counter on it.
Remove one +1/+1 counter and one -1/-1 counter from Moritte of the Frost as a state-based action.