NPCs composing that spawngroup :

an_elemental_harvester (50%)

Stonesoul_the_Unmoving (50%)

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

hole_12, range=189 (482,-256,-101)

hole_16, range=53 (614,-152,-233)

a_citybound_spirit (100%)
a_citybound_spirit (100%)

hole_17, range=119 (543,-211,-231)

a_citybound_spirit (50%)
a_citybound_spirit (50%)

hole_18, range=75 (554,-168,-231)

hole_19, range=99 (572,-200,-233)

a_citybound_spirit (50%)
a_citybound_spirit (50%)

hole_107, range=193 (420,-190,-212)

an_elemental_warrior (50%)
Caradon (50%)

hole_108, range=180 (420,-154,-212)

hole_233, range=176 (516,-262,-192)

Stonesoul_the_Unmovi_189536, range=171 (452,-201,-182)

an_elemental_harvester (50%)
Stonesoul_the_Unmoving (50%)

Stonesoul_the_Unmovi_189538, range=124 (544,-217,-192)

an_elemental_harvester (50%)
Stonesoul_the_Unmoving (50%)

an_elemental_capture_189551, range=185 (461,-234,-145)

an_elemental_capturer (50%)
muck_covered_elemental (50%)

an_elemental_capture_189552, range=148 (534,-239,-192)

a_flighty_fiend_189565, range=125 (592,-228,-233)

a_flighty_fiend (100%)

an_elemental_wizard_189573, range=141 (477,-184,-180)

an_elemental_wizard (100%)

an_elemental_wizard_189574, range=28 (599,-131,-233)

an_elemental_wizard (50%)
bejeweled_elemental (50%)

a_rock_golem_189646, range=113 (516,-186,-225)

a_rock_golem (100%)

a_rock_golem_189647, range=79 (536,-159,-225)

a_rock_golem (100%)

a_rock_golem_189649, range=29 (587,-132,-233)

a_rock_golem (100%)

an_elemental_deceive_189659, range=133 (488,-186,-192)

an_elemental_deceiver (100%)

an_elemental_deceive_189660, range=132 (498,-195,-193)

an_elemental_deceiver (100%)

an_elemental_channel_189679, range=113 (591,-216,-233)

an_elemental_channeler (100%)

holeLost_Spirit00024890051, range=129 (554,-227,-232)

Lost_Spirit (100%)

hole_275160, range=168 (486,-234,-220)

Julei_Direaxe (100%)