The thing about a divine vessel though, was that it had to be created to withstand divine power.
Zelda's body was created to age and feel, but Oni's body had to be created to resonate with the power of battle which comprised his divine essence.
It could be made of Link's blood, and tied to his spirit, the way the last one had been, but Farore strongly opposed it. She had damaged him too much, and his spirit might not take well to another visitor. If a Legendary Hero's blood could not be used, the next best thing would be the center of stars.
And that took time.
Especially when Farore refused to hurry and spent too much time working on what Oni thought were ridiculous details, such as the right shade of gray for his hair, or the colored streaks that ran through his face.
"Stop decorating it!" cried Oni.
"Just a little more," said Farore, tinkering with the shape of the lips.
But a little more turned into another two full turns of the moon, before Oni lost it and he sent the vessel down.
Farore cried that she wasn't done, but Oni knew better, because creation was never done. It would just go on forever, he knew. That was the thing about life. It never stopped, it just changed and changed forever.