NOTE: You can only do this after you have the Roc's Feather and te Zora's flippers

first you have to go to where you met with din turn the season to winter and head south, jump the holes and go southeast till you find the portal go in and head south, pass all the lava and use the power bracelets to get the bomb flower, now go to the temple and give the flower to the guy with the head band after the rocks are clear go in and talk to the spirit of autumn and you'll get the power of autumn. hooray!!!