NPCs composing that spawngroup :

a_decaying_skeleton (50%)

a_white_wolf (50%)

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

Everfrost_28, range=34 (2740,-96,-61)

Everfrost_24, range=94 (2801,-195,-60)

Everfrost_14, range=94 (2801,-195,-60)

Everfrost_12, range=51 (2783,-138,-61)

an_ice_goblin_whelp (50%)
a_white_wolf (50%)

Everfrost_10, range=94 (2801,-195,-60)