Oh yes, it did give him power. It gave him a level of strength and endurance far and beyond what he enjoyed from thestral blood. He accidentally crushed a hardened metal cup that was probably older than he was with a twitch of his thumb and forefinger. He became keenly aware of everything around him, afraid of stepping on the ground too hard and punching right through the floor with his boots. He also saw green flashes whenever he touched a wall or the floor with his bare skin, shrouds of cloudy, bright, green light that he could see beyond the walls and floors of the building.