NPCs composing that spawngroup :

An_Elite_Onyx_Drake (100%)

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

skyshrine_13, range=59 (896,1214,242)

An_Elite_Emerald_Drake (50%)
An_Elite_Shimmering_Drake (50%)

skyshrine_14, range=137 (970,1157,222)

An_Elite_Emerald_Drake (50%)
An_Elite_Onyx_Drake (50%)

skyshrine_18, range=173 (890,1100,222)

An_Old_Racnar (50%)
A_Shrine_Protector (50%)

skyshrine_44, range=173 (1021,1152,47)

A_Ruby_Drake (50%)
A_Ruby_Drake (50%)

skyshrine_46, range=128 (788,1204,67)

An_Emerald_Drake (50%)
An_Onyx_Drake (50%)

skyshrine_50, range=160 (736,1276,67)

skyshrine_51, range=26 (870,1274,67)

An_Emerald_Drake (50%)
An_Emerald_Drake (50%)

skyshrine_52, range=64 (870,1214,67)

A_Ruby_Drake (50%)
A_Shimmering_Drake (50%)

skyshrine_53, range=141 (970,1152,47)

An_Icy_Drake (50%)
A_Ruby_Drake (50%)

skyshrine_113087, range=161 (759,1187,71)

a_shambling_cube (100%)