Heart Eater

Since you're here, can you help me? You see, I am in desperate need of demon hearts. What for? To eat them, of course! I'm running out of energy.

I'm still waiting for those hearts.

Well, I guess I'm going to have to make use of it.
What? No, I'm not going to eat it! Just conduct a small energy-transmuting ritual...
You go bring me some more hearts!