Seems like reaper king (corrupted) is spawn commonly in Extinction too. I saw group of them, chasing Brontosaurus at south harshment area. But dododex didnt say if reaper is listed in Extinction creature. Its my first time saw a group of reapers at Extinction, i though they was rock drake at first look, then i use my telescope (idk what is the tool name) and its writed "Reaper king lv23"
I heard that these guys were based off of the Xenomorphs from the Alien franchise, and it definitely makes sense. Get impregnated by a queen, have a horrifying chestburster emerge and try to kill you? Seems pretty familiar!
Since i cant find this anywhere. Reapers take reduced damage naturally so its a good soaker. Dont bring light pets near theese because they take more damage and deal less damage.The reaper burns when light is near it. Nameless will attack it tho. Sorry for bad english.