IMPORTANT NOTE IF YOU WANT A 100% SAVE FILE-
Take a photo of Calamity Ganon, Dark Beast Ganon, AND THE BOW OF LIGHT (can be a selfie after picking it up) so they are saved in your compendium. ONLY YOUR FIRST DEFEAT OF GANON IS SAVED. So if you do everything else, then go back to get the photos...
Finish the pattern. Find another rock and put it where it 'belongs' and something MAGICAL will happen.
Look for the painter Sheikah guy who roams around Hyrule. He's usually near Stables and can help you there.