NPCs composing that spawngroup :

an_amorphous_mass (50%)

an_amorphous_mass (50%)

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

necropolis_21, range=190 (1299,673,-80)

an_amorphous_mass (100%)

necropolis_42, range=94 (1338,927,-100)

an_amorphous_mass (50%)
an_amorphous_mass (50%)

necropolis_43, range=92 (1330,919,-99)

an_amorphous_mass (100%)

necropolis_44, range=197 (1465,664,-155)

an_amorphous_mass (50%)
an_amorphous_mass (50%)

necropolis_46, range=185 (1556,914,-150)

an_amorphous_mass (50%)
an_amorphous_mass (50%)

necropolis_47, range=175 (1548,906,-151)

an_amorphous_mass (50%)
an_amorphous_mass (50%)

necropolis_48, range=149 (1502,935,-146)

an_amorphous_mass (50%)
an_amorphous_mass (50%)

necropolis_49, range=137 (1494,927,-148)

an_amorphous_mass (50%)
an_amorphous_mass (50%)

necropolis_158, range=180 (1307,681,-81)

an_amorphous_mass (100%)

an_inactive_trap_190119, range=77 (1366,769,-82)

an_inactive_trap_190120, range=182 (1371,1026,-106)

an_inactive_trap_190128, range=142 (1506,771,-148)

a_swarming_beetle_190140, range=90 (1362,932,-101)

an_empty_nest (25%)
a_nest (75%)