Once the old man disappeared, Hex cut off his powers, stopping himself from emanating fear.
He reached up to his hood with a shaking black hand and slowly put it back over his head, covering his weak white hair. At the same time, Blackie removed himself from Hex, getting rid of the purple horns and reverting the color of Hex's clothes back to blue.
As for Hex himself, his face returned, but there were a few wrinkles on it. His hair returned back to being dark green, but the ends of his hair had become white.
Although the power of fear was terribly strong, it also had a great cost. This was the case for both the old man and Hex.
It caused them to age.
If the energy they had was not enough, they were required to trade years of their lifespan just to use the ability for a few seconds. It was a high price, but worthwhile depending on the situation.