NPCs composing that spawngroup :

Grabble_Coldheart (100%)

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

crystal_2, range=125 (-297,285,-494)

crystal_6, range=175 (-394,280,-494)

a_stalag_terror (50%)
a_stalag_terror (50%)

crystal_14, range=89 (-228,248,-384)

Vevina_Velweaver (50%)
Vevina_Velweaver (50%)

crystal_16, range=137 (-129,204,-364)

Guard_Hollander (100%)

crystal_17, range=149 (-129,236,-364)

Guard_Grabadin (100%)

crystal_20, range=73 (-334,173,-559)

a_velium_crawler (100%)
a_velium_crawler (100%)

crystal_24, range=84 (-241,83,-526)

a_stalag_terror (50%)
a_stalag_terror (50%)

crystal_25, range=72 (-321,206,-384)

Derron_Coldmist (50%)
Derron_Coldmist (50%)

crystal_26, range=198 (-272,363,-428)

Fuller_Velweaver (50%)
Fuller_Velweaver (50%)

crystal_27, range=115 (-317,266,-398)

Guard_Evercold (100%)

crystal_28, range=102 (-316,251,-398)

Guard_Slacey (100%)

crystal_29, range=189 (-93,252,-364)

Guard_Kristen (100%)

crystal_33, range=112 (-241,54,-526)

a_stalag_terror (50%)
a_stalag_terror (50%)

crystal_35, range=164 (-339,310,-428)

a_Coldain_miner (50%)
a_Coldain_miner (50%)

crystal_36, range=189 (-224,351,-428)

a_Coldain_miner (50%)
a_Coldain_miner (50%)

crystal_37, range=88 (-322,229,-400)

Historian_Baenek (100%)

crystal_38, range=150 (-193,299,-384)

Kramble_Gemshard (100%)

crystal_39, range=68 (-263,233,-384)

Milliace_Gemshard (100%)

crystal_40, range=64 (-255,229,-400)

Captain_Dunstan_Coldheart (100%)

crystal_41, range=28 (-261,193,-384)

Guard_Kevin (100%)

crystal_42, range=187 (-363,322,-428)

Flint_Velweaver (100%)

crystal_45, range=21 (-243,177,-398)

Hardat_Gemshard (100%)

crystal_47, range=190 (-96,261,-400)

Cassia_Gemshard (100%)

crystal_48, range=194 (-95,267,-384)

Nadalia_Coldmist (50%)
Nadalia_Coldmist (50%)

crystal_49, range=80 (-228,238,-400)

Soren_Coldheart (100%)

crystal_52, range=198 (-176,344,-400)

Gilliad_Coldheart (100%)

crystal_59, range=176 (-381,35,-483)

#a_focus_gem (20%)
a_geonid (40%)
a_geonid (40%)

crystal_69, range=85 (-344,143,-526)

a_crystal_crawler (50%)
a_crystal_crawler (50%)

crystal_71, range=120 (-380,145,-524)

a_crystal_crawler (50%)
a_crystal_crawler (50%)

crystal_73, range=139 (-362,69,-523)

a_crystal_spiderling (100%)

crystal_81, range=115 (-362,106,-523)

a_crystal_crawler (100%)

crystal_111144, range=82 (-202,222,-384)

Scout_Grandan (100%)