NPCs composing that spawngroup :

spectral_caller (100%)

NPCs spawning around that spawngroup :
(Max range : 100)

karnor Scryer water, range=72 (-180,-320,-19)

karnor_skeletal_guardian14, range=75 (-73,-423,-49)

skeletal_guardian (50%)
skeletal_guardian (50%)

karnor_skeletal, range=35 (-107,-400,19)

karnor_223372, range=61 (-149,-314,3)

karnor_223374, range=94 (-61,-437,21)

karnor_223379, range=57 (-91,-329,3)

karnor_223380, range=84 (-81,-442,3)

karnor_223381, range=83 (-50,-398,31)

karnor_223382, range=71 (-133,-301,3)

karnor Scryer, range=59 (-128,-431,21)