No Cost Too Great

As an additional cost to cast this spell, sacrifice a creature.
Search your library for a card, put that card into
your hand, then shuffle.
No cost too great. No mind to think. No will to break.
No voice to cry suffering. Born of God and Void. You
shall seal the blinding light that plagues their dreams.
You are the Vessel. You are the Hollow Knight.
—The Pale King