Sunspire Mountains where to find the missing piece of the puzzle

I *think* the order is going Merrick>Sivu>Nyra>Aventus>Tagge>Ingram>War>Xynos, at this point?

The force of Ursus, brought together by the call of Merrick, was a stunning thing to behold. The rise of many bodies each brandishing knife-like teeth, seeking only the white beacon of Nyra — it was enough to awe even Sivugat, which rolled swiftly in to fear, as he lost his own nerve and could do nothing but watch.

There was a flash of red from the stone: a giant he did not know well, aiming for the Overlord. Merrick then reaching for her too, grappling, being grappled; blood sprayed and soaked and became the very air, and as Sivugat reeled from the sight of all these gnashing teeth tearing at the broad white that was once the leader of the Saints, the boy knew the truth of himself.

He felt wetness in his loins. The earth became ammonia-rich mud beneath him; but he did not notice the smell of himself as he rose, twisting away from the wolves that came. A gray body drove hard against him and he soundlessly snapped at the air, nearly catching his own tongue; the feeling of his teeth closing like a bear-trap would sting later in the heft of his jaw.

A stranger with a golden face was there, moving just as swiftly on the side of Ursus, seeking the dark shape which held Merrick firmly by the hip; Sivugat was distracted by the pain in his side and the new seething ache of his bruises, as well as the terror brought here by the cultists, and did not attack at all.

Instead, he tried to run.

This was not his fight — he was not of Ursus any longer and he was not a Saint, his loyalties hinged only on his own survival, and the only act that would ensure that, was a childish act of cowardice, of retreat. As hypocritical as it was of Sivugat to loathe Nyra for her own betrayal he now did the same: splitting from the mayhem and driving himself down and away from the vale.