0: exile kaya, ghost haunter haunting target creature for as long as that creature remains on the battlefield.
−1: you get an emblem with, "at the beginning of your upkeep, this emblem deals 3 damage to the owner of target haunted creature."
−2: you get an emblem with, "at the beginning of your upkeep, gain control of target haunted creature for as long as it remains haunted."