NPCs composing that spawngroup :

#A_Swirling_Elemental_Force (3%)

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

poair2150089, range=83 (362,-1661,8)

poair2150185, range=47 (422,-1555,16)

poair2150187, range=99 (356,-1527,6)

poair2150316, range=63 (484,-1591,27)