Cultist of Tzeentch

{u}: Sacrifice Cultist of Tzeentch, put a
Corruption counter on target creature.
{t}Sacrifice Cultist of Tzeentch: Remove 2
Corruption counters from creatures you don't
control to put a Horror creature from your hand
onto the battlefield under your control.
Not all who serve hear his call, but those who do
yearn for a greater purpose