NPCs composing that spawngroup :

Guard_Evercold (50%)

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

crystal_2, range=27 (-297,285,-494)

crystal_6, range=78 (-394,280,-494)

a_stalag_terror (50%)
a_stalag_terror (50%)

crystal_14, range=90 (-228,248,-384)

Vevina_Velweaver (50%)
Vevina_Velweaver (50%)

crystal_20, range=93 (-334,173,-559)

a_velium_crawler (50%)
a_velium_crawler (50%)

crystal_25, range=60 (-321,206,-384)

Derron_Coldmist (50%)
Derron_Coldmist (50%)

crystal_28, range=15 (-316,251,-398)

Guard_Slacey (50%)

crystal_35, range=49 (-339,310,-428)

a_Coldain_miner (50%)
a_Coldain_miner (50%)

crystal_37, range=37 (-322,229,-400)

Historian_Baenek (50%)

crystal_39, range=63 (-263,233,-384)

Milliace_Gemshard (50%)

crystal_40, range=72 (-255,229,-400)

Captain_Dunstan_Coldheart (50%)

crystal_41, range=92 (-261,193,-384)

Guard_Kevin (50%)

crystal_42, range=72 (-363,322,-428)

Flint_Velweaver (50%)

crystal_49, range=93 (-228,238,-400)

Soren_Coldheart (50%)