User blog comment:Xilinoc/Ch. 563 - SUPERSTAR NEVER DIE/@comment-14244059-20131226202839/@comment-5398287-20131231014027

They were probably just staring at him. From what we've seen, James needs at least some part of his body to be remaining after an attack in order to regenerate, and that Star Flash Supernova seems like it would simply obliterate him, which would be bad for Mask.