The Eternal Flower bloomed, releasing a torrent of pink rays that carried the chill of death.
Moonblast and Light of Ruin collided in midair. Although Mega Diancie's Light of Ruin no longer had any other additional boosts, the move itself had extremely high base power.
It also benefited from Fairy Aura. With both sides being Fairy-type Pokémon, however, the aura's effect effectively canceled itself out.
Even though Xerneas unleashed every last bit of power within its body, holding nothing back, it still could not suppress Mega Diancie's Light of Ruin.
Xerneas had indeed increased its Special Attack through Geomancy, but Mega Diancie's Special Attack had been higher than Xerneas's to begin with.
On top of that, Light of Ruin's base power was considerably higher than Moonblast's.
In the end, Light of Ruin shattered Moonblast and struck Xerneas, reducing its HP to just one-third.
Of course, unleashing such a powerful move came at a cost to Mega Diancie as well.
Forcing the Eternal Flower into action took a heavy toll on Mega Diancie's HP, leaving her with only one-third remaining, just like Xerneas.
The situation still looked fairly balanced, and it seemed impossible to tell who would win until the very end. But Zhang Cheng knew the outcome had already been decided.
Mega Diancie still had a move she had yet to use—one that would leave Xerneas in despair.
"Mega Diancie, use Heal Pulse!"
That was right. The move that would leave Xerneas in despair was the Psychic-type move Heal Pulse, one Mega Diancie used frequently.
Against Xerneas, this move was a decisive trump card, because Xerneas's HP was more than twice Mega Diancie's.
Under these circumstances, no matter how much HP Mega Diancie had left, a single Heal Pulse could restore her to full health and bring her straight back