The instant Diancie saw the prism, more than half of which had turned into black crystal pillars, it understood everything.
A sentence suddenly surfaced in its mind—
[This is a reward for the brave.]
That was right. If it had not chosen this path, one that carried an overwhelming chance of sacrificing itself, it would never have reached this truth.
It would probably still be with Reshiram and the others, trying to resist Dawn Wings Necrozma.
Su Hao had once told it this.
There were only two ways to defeat Necrozma.
The first was to use a Creator God against a Creator God. In terms of raw power, an unrestricted and uninjured Arceus was more than capable of defeating, even suppressing, Necrozma.
The second was to gather countless rays of light, find and use the Z-Crystal known as Ultranecrozium Z, and help the out-of-control Necrozma undergo an Ultimate Burst to regain its sanity and its true self.
There was no need to elaborate on why the former was impossible.
Diancie had originally felt that the latter was unreliable.
Having once been targeted by the Governing Elders' Council of Ultra Megalopolis, it knew all too well just how filthy those people's methods could become when necessary.
It could not even begin to imagine how Necrozma must have felt when it was betrayed by its own people.
Combined with the wild aura emanating from Dawn Wings Necrozma, which had blotted out Pokémon Sun and Pokémon Moon, its wings seeming large enough to cover Blue Star, Diancie had become even more determined to use its own method.
But now, it realized it had been wrong.
—Not merely wrong, but absurdly wrong.
Perhaps because their powers came from the same source... no, it should be because the core before it was the source of