NPCs composing that spawngroup :

an_undead_oblation (50%)

greater_war_boned_skeleton (50%)

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

charasis_114, range=196 (-42,444,22)

charasis_117, range=159 (-91,657,22)

charasis_119, range=172 (-90,675,23)

charasis_120, range=184 (-91,692,22)

charasis_124, range=188 (-62,429,21)

a_bile_golem (50%)
a_sepulcher_skeleton (50%)

charasis_125, range=161 (-64,476,22)

a_bottomless_feaster (50%)
greater_war_boned_skeleton (50%)

charasis_126, range=98 (-141,621,22)

a_sepulcher_skeleton (50%)
a_sepulcher_skeleton (50%)

charasis_127, range=41 (-170,532,14)

charasis_128, range=71 (-144,518,3)

a_bile_golem (100%)

charasis_129, range=93 (-116,532,14)

charasis_133, range=130 (-156,429,22)

charasis_134, range=142 (-132,429,22)

charasis_143, range=141 (-144,423,22)

a_sepulcher_skeleton (100%)

charasis_205, range=134 (-95,621,23)

a_bottomless_devourer (100%)

charasis_208, range=81 (-127,548,4)

greater_war_boned_skeleton (100%)