Seathe the Scaleless

Flying, Hexproof.
{t},{b}{b}{b}: Seathe the Scaleless destroys all
tapped creatures with converted mana
cost 4 or less.
Sorceries, cast by Seathe the Scaleless'
controller cost {2} less to cast.
"Seathe wanted the power of immortal stone scales,
he instead found madness."