Greater Doppelgangers

[Markwart Storme]

I just try to beat the virtual out of reality.
I try to get the needed badge of Greater Doppelgangers, but I can hardly kill even a single one of them before they mutate into something else with their ridiculous initiative stats.
How did you do that? Whose idea was it to make THEM needed for that quest, as you can't really kill them before they count for different monsters?

They are the only monster I didn't yet fill the bestiary for, so it must be them, which I have to kill.

 

[Zemurin]

You wear the +10 Initiative boots, get into the high-school end room fight, kill as many as you can before they mutate, and then flee. Eat up, enter the same room again, rinse and repeat. Having a Bookworm character doubles your progress to 100%.