Asmodeus flinched, he wasn't expecting there's a weapon that could nullify his power.
Arthur was fascinated upon seeing the demon's ability, he was imagining what height he could reach upon learning the secret of how to absorb other's life force and turn them into his own power.
The king soared high, showing his dominance over the demon despite he's way smaller than the latter.
"Say, demon! Are you interested in joining my cause? Together, we shall reign over this land once and for all!"
"Joining your cause? Bah! Why would I join a lesser creature like yourself that I can kill with just a mere gaze?!"
Asmodeus looked at Arthur menacingly, his eyes shone in bright crimson light. With the energy that he drew directly from the Nether Realm, Asmodeus was able to terrorize others' minds with a whim of his thoughts.
However, after a brief moment, nothing happened with Arthur. The demon was surprised when Arthur returned the gaze.