"This voice really came from the sword?" He thought
Emery was startled for a second, but actually, during his study in the Magus Academy, he had heard that it wasn't uncommon for a high-tier artifact to have a soul being embedded into it. That might be the case for this particular sword.
Emery calmed himself down and grabbed the sword once more. This time, he purposefully asked a question in his mind.
"Tell me, why am I unworthy? Am I lacking in strength to wield it?"
From the way, the sword worded its answer, Emery quickly deduced that only humans with light element affinity could be considered 'worthy', and a darkness element acolyte like him had to just forget about having a chance to wield it.
He rubbed his forehead, dismayed at the answer he obtained. Did it mean he could never wield the sword?