NPCs composing that spawngroup :

an_elder_lavaspinner (33%)

NPCs spawning around that spawngroup :
(Max range : 10)

delvea_monocle_2_26, range=1 (-933,-1159,-16)

delvea_monocle_3_27, range=1 (-933,-1159,-16)

delvea_monocle_4_121, range=1 (-933,-1159,-16)

delvea_monocle_7_27, range=1 (-933,-1159,-16)

delvea_monocle_8_9, range=1 (-933,-1159,-16)