The first thing that came to Dian's mind upon seeing the Ruinous Calamity in his realm was his sudden realization of why he felt that immense sense of danger while meditating earlier.
Than his mind spun as his thoughts wandered towards! How easily the Calamity broke into his realm upon seeing that black colored spiraling-vortex behind the two Vampire's.
Well! That wasn't a surprise anyways. But his pride and confidence still took a major blow from this realization.
It certainly wasn't a good feeling to find out that he was just an ant or perhaps not even an ant before the Calamity that have descended upon his realm.
Dian wasn't weak by any means! Being a Divine assassin! He surely had his fair share of experience in successfully assassinating other Divine's.
In any case before the Vampire Kings daughter! He was genuinely nothing and that was something Dian just could not accept.