NPCs composing that spawngroup :

#A_Swirling_Elemental_Force (3%)

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

poair2150100, range=75 (-570,-1573,356)

poair2150173, range=72 (-637,-1607,344)

poair2150176, range=53 (-674,-1499,334)