Otherworldly Hunter

+1: Target Opponent's Creature gets "When it dies, exile it, controller gets 0/1 B/U Nightmare with 'Beginning of turn,lose 1 life." Then Investigate
-3: Put an X/X black Horror token onto the battlefield, where X = # of Clues. Target Creature you control fights Target Creature you don't control.
-8: You get an Emblem with "When you sac a clue, may pay X. Put X Y/Y B horrors onto the battlefield, where Y=# Clues. When Horror dies, Investigate