NPCs composing that spawngroup :

an_elder_shard_wyvern (50%)

a_racnar (50%)

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

templeveeshan_25, range=195 (-1000,-1780,-15)

templeveeshan_84, range=82 (-740,-1841,-16)

templeveeshan_86, range=59 (-880,-1859,-16)

templeveeshan_136, range=79 (-820,-1780,0)

an_ancient_guardian_wurm (50%)
a_fiery_guardian (50%)

templeveeshan_140, range=166 (-660,-1818,-16)

an_elder_crimson_drake (50%)
a_malevolent_drake (50%)