The Powder Keg found in The Legend of Zelda: Majora's Mask is a much stronger version of the bomb. It is used mainly to clear the path to the Romani Ranch on day 1 or day 2, It's also used to blow a hole in Ikana Castle, it can only be obtained and carried when Link is in his Goron form and after he has completed a trial by opening up the Goron Races in Snowhead.
