Bruce stared at the place where his blade had been moments before Mikey simply made it disappear, his fingers still held as though gripping the hilt. He listened intently, though, to Mikey and Ross' explanation, taking particular notice of Ross' comment that ki was not an object, but an extension of the soul. It made sense to him. Finally able to accept the ease with which it was destroyed, he glanced down at his sheath. He wondered if having it, something he felt a bit emotionally attached to, affected the flow of his ki into his blade. He made a note to experiment in the coming days while everyone trained. 
Breaking himself out of his reverie, he focused on the rest of Mikey's talk to Jeff and Jenso about Arki. Bruce had the feeling that the information might not directly influence his own personal training, but understanding how his allies would operate during the final confrontation could mean the difference between victory and death.