Magus of the Celestial Purge

Lifelink, protection from black and from red.
{t} Sacrifice Magus of the Celestial Purge with 4
time counters on it, at the beginning of you
upkeep remove a time counter from Magus of
the Celestial Purge. When the last is removed
cast it without paying its mana cost. Exile target
black or red permanent.
"All evil shall be purged from the world!"