NPCs composing that spawngroup :

an_icy_terror (50%)

an_icy_terror (50%)

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

permafrost_51, range=74 (1024,-2,3)

an_icy_terror (50%)
an_icy_terror (50%)

permafrost_87, range=159 (957,-225,-108)

a_giant_polar_bear (50%)
a_giant_polar_bear (50%)

permafrost_88, range=59 (933,-72,-108)

a_giant_polar_bear (100%)

permafrost_89, range=79 (928,-23,-108)

a_giant_polar_bear (50%)
a_giant_polar_bear (50%)

permafrost_90, range=161 (894,58,-80)

permafrost_93, range=167 (1037,-231,13)

an_ice_giant (50%)
an_ice_giant_magus (50%)

permafrost_94, range=174 (852,-173,11)

an_ice_giant (50%)
an_ice_giant_priest (50%)

permafrost_131, range=114 (1106,-89,-74)

giant_wooly_spider (100%)

permafrost_133, range=176 (1125,-187,-78)

a_giant_dire_wolf (100%)

permafrost_146, range=148 (895,42,-31)

an_ice_giant_magus (100%)

permafrost_150, range=194 (839,49,-37)

giant_wooly_spider (100%)

permafrost_151, range=193 (1145,-190,-79)

giant_wooly_spider (100%)

permafrost_153, range=182 (1115,-206,-81)

The_Ice_Witch (100%)

permafrost_154, range=99 (953,21,-77)