SCP-3125, The Escapee

Enters face down as a 2/2 creature. While face
down, if it would take damage or die, you may
pay {2}{u}{u}{b}{b}{r}{r}. If you do, turn it face
up. When it is turned face up, target opponent
exiles all creatures of one type. (If it would have
taken damage or died this turn, the type of
creature must be the same as that which would
have dealt the damage. If not, opponent chooses.)
It then phases out until your next turn. It phases
in face down