NPCs composing that spawngroup :

#Bledrek (5%)

a_crystalline_sentinel (47%)

a_crystal_destroyer (10%)

a_crystal_sentinel (38%)

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

velketor_Icepaw_kobold65, range=48 (-160,0,-69)

Icepaw_kobold (100%)

velketor_seven13, range=62 (-244,70,-72)

From_no_where (50%)
seven (50%)

velketor_A_stalagtite19, range=68 (-138,-1,-72)

A_stalagtite (50%)
one (50%)

velketor_Ice17, range=44 (-177,-13,-71)

Ice (50%)
three (50%)

velketor_eight12, range=67 (-265,0,-72)

eight (50%)
You_are (50%)

velketor_TerrorSpawner114, range=88 (-220,111,-13)

TerrorSpawner (100%)

velketor_223627, range=47 (-202,-23,7)

velketor_223664, range=77 (-140,-22,-70)

an_Icepaw_kobold_priest (50%)
Icepaw_kobold (50%)

velketor_223681, range=67 (-139,0,-72)

aedispellph (50%)
a_shimmering_orb (50%)