NPCs composing that spawngroup :

#a_shrouded_bat (100%)

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

frozenshadow_2, range=97 (776,127,177)

#maggot_infested_flesh (50%)
oozing_flesh (50%)

frozenshadow_3, range=88 (798,-35,178)

frozenshadow_5, range=42 (777,7,178)

an_ancient_mummy (50%)
an_ancient_mummy (50%)

frozenshadow_6, range=166 (902,91,178)

an_ancient_mummy (50%)
an_ancient_mummy (50%)

frozenshadow_8, range=95 (810,103,177)

oozing_flesh (100%)

frozenshadow_9, range=126 (803,146,178)

#Narmak_Berreka (10%)
an_ancient_mummy (90%)

frozenshadow_87, range=180 (615,-91,220)

frozenshadow_135, range=72 (793,-19,304)

#a_shrouded_bat (100%)

frozenshadow_148, range=66 (679,23,306)

#a_shrouded_bat (100%)

a_disabled_trap_189741, range=118 (860,6,306)

a_disabled_trap (100%)

a_shaded_torch_189747, range=194 (556,82,307)

a_shaded_torch (100%)

a_shaded_torch_189748, range=185 (570,-28,307)

a_shaded_torch (100%)

a_shaded_torch_189749, range=175 (570,38,307)

a_shaded_torch (100%)

frozenshadowa_shadow0016033503, range=165 (910,21,178)

a_shadow (100%)