NPCs composing that spawngroup :

#A_Swirling_Elemental_Force (3%)

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

poair2150090, range=30 (327,-1488,8)

poair2150187, range=56 (356,-1527,6)

poair2150189, range=42 (385,-1498,6)