NPCs composing that spawngroup :

elementalbone_skeleton (50%)

hexbone_skeleton (50%)

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

charasis_7, range=194 (117,-458,40)

an_undertaker_skeleton (50%)
a_hamal_skeleton (50%)

charasis_9, range=185 (146,-422,24)

charasis_10, range=178 (152,-404,24)

charasis_11, range=145 (-99,-388,5)

a_helot_spectre (100%)

charasis_14, range=170 (101,-440,22)

charasis_15, range=141 (101,-404,23)

charasis_19, range=159 (-43,-444,22)

charasis_20, range=112 (28,-405,22)

charasis_21, range=110 (7,-404,22)

charasis_22, range=18 (6,-276,23)

charasis_23, range=69 (79,-276,22)

charasis_24, range=127 (139,-299,21)

charasis_25, range=132 (85,-183,22)

charasis_26, range=106 (86,-217,23)

charasis_27, range=147 (12,-147,22)

a_pyre_golem (50%)
a_pyre_golem (50%)

charasis_29, range=148 (-12,-147,22)

charasis_30, range=184 (-1,-111,21)

a_pulsating_bile (50%)
hexbone_skeleton (50%)

charasis_31, range=130 (52,-170,23)

charasis_32, range=79 (52,-225,22)

charasis_33, range=95 (-28,-207,22)

charasis_92, range=112 (-82,-355,4)

charasis_112, range=71 (-1,-224,-194)

a_sepulcher_skeleton (100%)

charasis_173, range=54 (63,-278,-176)

charasis_174, range=36 (45,-279,-194)

greater_war_boned_skeleton (100%)

charasis_175, range=109 (25,-185,-194)

charasis_176, range=115 (-25,-185,-194)

charasis_177, range=71 (31,-225,-194)

a_sepulcher_skeleton (100%)

charasis_196, range=185 (-45,-471,22)

charasis_197, range=128 (-83,-381,4)

charasis_198, range=153 (-115,-381,5)

charasis_199, range=142 (-116,-357,5)

charasis_203, range=135 (-28,-424,21)

a_pulsating_bile (100%)

charasis_204, range=53 (14,-348,22)

hexbone_skeleton (100%)

charasis_209, range=125 (116,-224,23)

a_helot_spectre (100%)