Feaster of Belief

Nightmare - Pay 5 life (This creature enters the battlefield with a dream counter on it. You may pay its nightmare cost at any time to remove a dream counter from it. Creatures with dream counters on them are enchantments and lose all other card types.)
Feaster of Belief gets -X/-X, where X is your life total.
Gaze into the void, and let all inside wither to its darkness. Only then will it grant you power.