Darkeater Midir

Flying, Trample
{t}, {x}{x}{b}{b}{r}: Deal X damage to target
opponent. If X is superior or equal to 4, destroy
all creatures that opponent controls. Darkeater
Midir does not untap on your next untap phase.
Raised by the Old Gods, Midir was tasked to
fight humanity's darkness for eternity. However
he became corrupt himself.