Mask of Scents

The Mask of Scents is the prize you get by beating the Deku Butler's challenge after finishing the Woodfall Temple. It allows you to sense the smell of the mushrooms in the Lost Woods.

You can also get a mushroom scent in Clock Tower. Any day go to the Stock Pot Inn and enter the third room on the 2nd floor, there you will find some shorts, put on the Mask of Scents to get the aroma into an empty bottle.

Remember you can trade the mushroom at Witch's Hut to get a Blue Potion.