Raelok, Horrors Reforged

Whenever a creature leaves the battlefield, you may pay its converted mana cost in {p/b}. If you do, you may put a 1/1 token black horror creature on the battlefield under your control.
Whenever a creature is dealt damage by a horror token, put a -1/-1 counter on it until it deals damage to a non-horror creature.
"They don't understand, fear isn't an emotion. It's a weapon"- Raelok, Lord of Fear