Snore had evolved and had developed new attacks after the breakthrough, but its feathers remained its strongest assets. Its structure had also improved after the dark world gained access to a superior form of dark matter, so the power contained in those giant weapons had become unfathomable.
Snore was the expression of the dark world's destructiveness, and its feathers could discharge that massive power in a single attack. Dinia and the others only had the time to deploy everything they had to protect their worlds before falling prey to the raging currents generated by that ability.
The feathers unleashed pure destruction that transformed into a proper storm. Nothing the experts did could put an end to that event. Snore could unleash a catastrophe inside the very sky, and Heaven and Earth didn't have enough power to stop it even after awakening. Everything simply shattered after touching the raging currents that continued to expand on the battlefield.