First on the third day go to Sakons hideout and you will see Kafei behind a rock, then go to the rock blocking the entrance to Sakons hideout and roll at the track, then, if you're lucky you'll roll through to Sakons hideout (Note:Some times you will roll through the crack and into water, if this happens just try again) so when you are inside have Link put on any mask and then step on the switch so Kafei will go through the door, then press start and switch the Fierce Dietys Mask with whatever mask Link is wearing and then completethe room, when it is Links turn he will have to put the Fierce Dietys Mask on! Then complete Sakons hideout and you can have half a day of wearing the Fierce Dietys mask on !