NPCs composing that spawngroup :

Niltoth_the_Unholy (100%)

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

hole_21, range=74 (1057,506,-605)

hole_24, range=44 (1025,506,-605)

hole_29, range=32 (1001,548,-641)

hole_135, range=58 (928,503,-570)

hole_137, range=93 (933,443,-574)

hole_138, range=78 (972,443,-574)

hole_139, range=15 (970,513,-570)

hole_140, range=55 (1038,533,-582)

hole_141, range=13 (982,534,-618)

hole_142, range=92 (1072,549,-630)

hole_186, range=85 (971,606,-574)

va_hole_21, range=74 (1057,506,-605)

va_hole_24, range=44 (1025,506,-605)

va_hole_29, range=32 (1001,548,-641)

va_hole_138, range=78 (972,443,-574)

va_hole_186, range=85 (971,606,-574)