NPCs composing that spawngroup :

greater_plaguebone (100%)

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

charasis_87, range=165 (26,243,-194)

a_sepulcher_skeleton (100%)

charasis_110, range=132 (-17,-29,-158)

an_undead_oblation (100%)

charasis_111, range=146 (-96,-42,-189)

greater_war_boned_skeleton (100%)

charasis_118, range=64 (-12,147,22)

charasis_121, range=82 (12,147,22)

charasis_136, range=136 (-72,234,23)

a_bottomless_feaster (100%)

charasis_138, range=196 (-189,243,22)

charasis_139, range=181 (-188,222,22)

charasis_142, range=136 (-72,234,22)

a_sepulcher_skeleton (100%)

charasis_145, range=158 (79,184,22)

charasis_148, range=186 (9,273,21)

a_bile_golem (100%)

charasis_149, range=161 (-20,257,22)

charasis_151, range=137 (61,173,22)

charasis_152, range=169 (60,224,21)

charasis_155, range=159 (-154,224,-139)

charasis_156, range=164 (-136,242,-162)

a_sepulcher_skeleton (50%)
greater_plaguebone (50%)

charasis_157, range=103 (25,165,-194)

a_pyre_golem (50%)
a_pyre_golem (50%)

charasis_158, range=72 (-25,165,-194)

a_pyre_golem (50%)
a_pyre_golem (50%)

charasis_159, range=53 (-2,92,-188)

a_bottomless_gnawer (50%)
greater_war_boned_skeleton (50%)

charasis_165, range=179 (-226,152,4)

a_crypt_spectre_189514, range=188 (-237,147,5)

charasis_Acolyte_of_Convergence000_1949931, range=163 (46,-29,4)

Acolyte_of_Convergence (100%)