Creature — Merfolk Rogue Warrior 2/1, 2{U/B} (3)

Whenever you cast a blue spell, Gravelgill Duo gets +1/+1 until end of turn.

Whenever you cast a black spell, Gravelgill Duo gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

Illus. Brandon Kitkouski