NPCs composing that spawngroup :

a_sepulcher_skeleton (50%)

a_sepulcher_skeleton (50%)

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

charasis_115, range=158 (7,565,23)

charasis_116, range=173 (7,531,22)

charasis_117, range=61 (-91,657,22)

charasis_119, range=74 (-90,675,23)

charasis_120, range=86 (-91,692,22)

charasis_122, range=108 (-47,674,23)

charasis_123, range=161 (3,549,21)

a_bile_golem (50%)
a_bile_golem (50%)

charasis_125, range=164 (-64,476,22)

a_bottomless_feaster (50%)
greater_war_boned_skeleton (50%)

charasis_127, range=93 (-170,532,14)

charasis_128, range=102 (-144,518,3)

a_bile_golem (100%)

charasis_129, range=92 (-116,532,14)

charasis_130, range=97 (-208,549,22)

an_undead_oblation (50%)
greater_war_boned_skeleton (50%)

charasis_133, range=192 (-156,429,22)

charasis_134, range=192 (-132,429,22)

charasis_143, range=197 (-144,423,22)

a_sepulcher_skeleton (100%)

charasis_205, range=46 (-95,621,23)

a_bottomless_devourer (100%)

charasis_208, range=74 (-127,548,4)

greater_war_boned_skeleton (100%)