NPCs composing that spawngroup :

a_pulsating_bile (50%)

hexbone_skeleton (50%)

NPCs spawning around that spawngroup :
(Max range : 100)

charasis_27, range=38 (12,-147,22)

a_pyre_golem (50%)
a_pyre_golem (50%)

charasis_29, range=37 (-12,-147,22)

charasis_31, range=79 (52,-170,23)

charasis_33, range=99 (-28,-207,22)

charasis_78, range=81 (-45,-43,6)

a_sepulcher_skeleton (100%)

charasis_110, range=84 (-17,-29,-158)

an_undead_oblation (100%)

charasis_175, range=78 (25,-185,-194)

charasis_176, range=77 (-25,-185,-194)