NPCs composing that spawngroup :

an_Isle_braintwister (100%)

NPCs spawning around that spawngroup :
(Max range : 200)

thundercrest_monocle_121, range=147 (-430,-1209,295)

thundercrest_monocle_123, range=146 (-550,-1209,295)

thundercrest_monocle_125, range=66 (-430,-1102,295)

thundercrest_monocle_127, range=64 (-550,-1102,295)

thundercrest_monocle_131, range=59 (-491,-1016,300)

thundercrest_monocle_5_139, range=67 (-491,-1143,297)

thundercrest_monocle_5_147, range=64 (-550,-1102,295)

thundercrest_monocle_6_80, range=146 (-550,-1209,295)

thundercrest_monocle_6_81, range=66 (-430,-1102,295)

thundercrest_monocle_6_82, range=64 (-550,-1102,295)

thundercrest_monocle_7_98, range=146 (-550,-1209,295)

thundercrest_monocle_7_99, range=133 (-491,-1209,297)

thundercrest_monocle_7_102, range=147 (-430,-1209,295)

thundercrest_monocle_7_105, range=66 (-430,-1102,295)

thundercrest_monocle_7_108, range=171 (-491,-904,320)