Gengar

{4}{b}{b} Evolve: Place Gengar on target Haunter
you control
Flying, Cursed Body. (When this creature blocks or
gets blocked by another creature, roll a d6. If 1-2,
disable target ability that costs mana for 3 turns)
{2}{b}{b}{b}: Dark Pulse, move deals 2 damage, this
move hits first
{2}{b}{b}{b}: Shadow Ball, move deals 4 damage