Uulroth, the Sky Agape

Flying, intimidate, protection from instants
Other Horror creatures you control get +0/+13.
Whenever a Horror you control would be dealt damage, prevent that damage. Horror creatures
you control get -0/-X until end of turn, where X
is the amount of damage prevented this way.
Whenever a Horror you control becomes blocked
by a nonblack, nonartifact creature, exile that
creature at end of combat.