An unconscious Scout Parasite clone was standing in front of me and looking at him resurfaced some nasty memories that I didn't wanna remember. There was a time between the second and the third Cataclysm when these were one of the most dreaded creatures present on Planet Vermillion.
As time passed, all the races evolved enough to stand toe to toe against them, later on became strong enough to defeat them even without blinking their eyes.
Their existence was wiped out by the end of the third Cataclysm. And in the aftermath of it all that was left was a black mark in the history of Planet Vermillion that constantly reminded them about the horrendous things they did to us.