Sunspire Mountains where to find the missing piece of the puzzle

since this was AW im throwing merrick in, lmk if u would prefer i remove this

the heat of battle died to embers as it became clear that the saints had fled.
merrick hated their cowardice. 
he mourned astara and combed the stone faces, growling wordlessly to @Avicus and @Aventus. they were what remained of his bloodcore.
and when his single eye fell upon this wolf whose scent had been upon the vale, merrick did not waste a moment. his long legs whipped and his teeth ached in the cold air. 
blood for the bear god.