Clyde grinned after he see the information about the monster.
It turned out that the monster was not as strong as its dreadful appearance. Maybe it's because Agatha has managed to restore the setting of this apocalypse - Selection Stage, somehow.
Maybe because all the parties that previously messed up the setting were no longer interested and left here after seeing what happened to Clyde.
There was a man who claimed to be a servant of a God, then Nimue who claimed to serve Gremory, then the two World Masters who schemed behind each other's backs.
All of that might make anyone who wants to mess up the settings so no longer interested in doing so.
Because they saw that many other parties were approaching Clyde, there was no point in messing up the settings anymore since Clyde was clear that he would be strong enough to go through everything.
'Or is there another reason I missed I didn't know? Anyway, it doesn't matter anymore.'