NPCs composing that spawngroup :

an_ice_giant (100%)

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

permafrost_34, range=109 (567,246,17)

an_ice_goblin (50%)
a_goblin_evoker (50%)

permafrost_56, range=183 (519,178,17)

permafrost_58, range=191 (496,201,17)

an_ice_goblin (50%)
a_goblin_wizard (50%)

permafrost_80, range=122 (550,260,17)

an_ice_goblin (50%)
a_goblin_prelate (50%)

permafrost_99, range=177 (493,283,17)

a_goblin_evoker (50%)
a_goblin_priest (50%)

permafrost_100, range=189 (481,293,17)

an_ice_goblin (50%)
a_goblin_priest (50%)

permafrost_101, range=150 (619,140,5)

an_ice_goblin (50%)
a_goblin_evoker (50%)

permafrost_102, range=127 (614,168,3)

an_ice_goblin (50%)
a_goblin_priest (50%)

permafrost_103, range=140 (590,166,3)

an_ice_goblin (50%)
a_goblin_priest (50%)

permafrost_142, range=124 (680,158,-29)

an_ice_giant (100%)

permafrost_147, range=141 (759,172,-29)

an_ice_giant (100%)

permafrost_148, range=41 (704,259,-31)

an_ice_giant_priest (100%)

permafrost_151, range=54 (620,261,-39)

giant_wooly_spider (100%)

permafrosta_goblin_priest016171868369, range=187 (512,181,17)

a_goblin_priest (100%)