NPCs composing that spawngroup :

#The_Spectre_Sepulcher (25%)

an_undead_oblation (25%)

a_helot_spirit (25%)

a_sepulcher_skeleton (25%)

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

charasis_68, range=189 (346,208,4)

charasis_74, range=112 (244,117,5)

charasis_75, range=182 (339,191,4)

charasis_78, range=189 (341,146,4)

a_sepulcher_skeleton (100%)

charasis_83, range=119 (264,135,4)

charasis_84, range=128 (251,102,4)

charasis_87, range=141 (26,243,-194)

a_sepulcher_skeleton (100%)

charasis_118, range=174 (-12,147,22)

charasis_121, range=150 (12,147,22)

charasis_140, range=46 (131,228,23)

charasis_141, range=87 (143,275,23)

a_bottomless_feaster (100%)

charasis_145, range=78 (79,184,22)

charasis_148, range=169 (9,273,21)

a_bile_golem (100%)

charasis_149, range=189 (-20,257,22)

charasis_150, range=90 (157,279,22)

charasis_151, range=97 (61,173,22)

charasis_152, range=103 (60,224,21)

charasis_153, range=152 (300,241,-158)

charasis_154, range=144 (280,265,-158)

charasis_157, range=134 (25,165,-194)

a_pyre_golem (50%)
a_pyre_golem (50%)

charasis_158, range=183 (-25,165,-194)

a_pyre_golem (50%)
a_pyre_golem (50%)

charasis_159, range=185 (-2,92,-188)

a_bottomless_gnawer (50%)
greater_war_boned_skeleton (50%)

pulsating_bile_189511, range=96 (239,138,5)