The colossal, mutated maw was closing in, swallowing the light around him.
Sirius rotated his body with every bit of his remaining strength. As he also forced a final, agonizing fusion with his two beasts, violently scraping the absolute bottom of his core to charge one last beam of Light and Darkness.
He emptied his entire system into the attack.
If he could just stagger the Platinum beast, if he could push its colossal mass back down into the sinkhole, Ren would have a chance to survive.
A tiny, microscopic chance, but a real one. The boy could run or he could hide in the overgrowth and wait for the city's vanguard.
Sirius had to trust that Ren was still conscious inside the shadow-dimension. The Wolverine hadn't forcefully vomited its passengers onto the shadow space, which meant the boy's mana was still circulating.
