Could it be that the thing in front of him was afraid of thunder and lightning attacks?
As luck would have it.
He had just recently mastered the first move of the "Three Pure Thunder Shadow."
As he wielded it, he invoked the power of thunder.
He saw the black beams about to shoot out from the mirror.
He no longer hesitated.
He tried lifting his leg and kicking.
A faint, flickering thunder arc appeared on his right leg.
With a 'hiss' sound.
The thunder arc lashed into the belly of the black mirror.
Hiss hiss hiss—
An extraordinary scene unfolded.
The black mist, which he could do nothing against with his swordsmanship, was immediately seared by the thunder arc the size of a fingertip, as if a hot iron brand was placed against human skin.
IInstantly, the belly of the mirror evaporated into dense black smoke.
A scream of pain and anguish came from the mirror brewing those black beams.
Next, a furious human voice came: "How do you know Thunder Technique?"