Cauldron of Souls

{t}: Choose any number of target creatures. Each of those creatures gains persist until
end of turn. (When it dies, if it had no -1/-1 counters on it, return it to the battlefield
under its owner's control with a -1/-1
counter on it.)
Now I call on my Army of the Dead; the Cauldron-born! Arise, my messengers of death!
Our time has arrived! —The Horned King