NPCs composing that spawngroup :

#A_Swirling_Elemental_Force (3%)

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

poair2150129, range=59 (-462,988,5)

poair2150210, range=38 (-451,921,6)

poair2150211, range=63 (-484,945,6)