NPCs composing that spawngroup :

a_Creep_basilisk (100%)

NPCs spawning around that spawngroup :
(Max range : 200)

eastkorlach64286, range=51 (-522,-265,-11)

eastkorlach64288, range=108 (-585,-240,-9)

eastkorlach64290, range=150 (-554,-370,-6)

eastkorlach_monocle_1_327, range=83 (-538,-297,-11)

eastkorlach_monocle_1_328, range=54 (-525,-265,-11)

eastkorlach_monocle_1_329, range=52 (-528,-236,-12)

eastkorlach_monocle_1_330, range=145 (-598,-320,-11)

eastkorlach_monocle_1_334, range=183 (-660,-245,-10)