As Dean saw Harpe getting surrounded by that dark gray aura, he took a step back. Just like what happened with Perseus when Excalibur's power was rising, a chill ran down Dean's spine. His body shivered in fear as he felt that his enemy was way stronger right now.
'I am taking too many steps back here... I need to keep pushing forward, maintaining this guy as far away as possible from Claire. Our battle isn't causing major destruction around just because we are fighting safely, only studying each other's fighting style. He is releasing his power bit by bit, and so do I.'
Anyway, Dean knew that soon there wouldn't be any reason for them to hold back. When this time came, things would get quite chaotic and he didn't want to put Claire inside of that storm.
