Despite being a dungeoneering reward the scroll of efficiency does not work whilst dungeoneering. Once the scroll is read, it cannot be bought again. However, multiple scrolls may be bought as long as the ability hasn't been unlocked. When read, you get the message: The secret is yours! You unlock the ability to save bars when smithing. and when you save a bar you get the message: Wasteless smithing: (Type of Bar) bar saved! * Battleaxes * Warhammers * Chainbodies * Kiteshields * Two-handed swords * Platelegs * Plateskirts * Platebodies