The Scroll of efficiency is a Dungeoneering reward sold by Marmaros and Wythien. It requires a Smithing level of 55 and a Dungeoneering level of 55. Reading the scroll of efficiency permanently unlocks the ability: when smithing items which require at least 3 bars, there is a chance of retaining a bar. The chance of saving is less with higher tier bars. The chance of saving a bar is per (at least 3-bar) item smithed, not each bar has a chance of being saved. For example, smithing steel platebodies in the long run will use up 4.8 bars per body, while smithing steel chainbodies will use up 2.8 bars per body.
Once the scroll is bought, it cannot be bought again. If a player tries to buy a second scroll, a message will appear saying "You've already got one of those. Go read it."
When read, you get the message: "The secret is yours! You unlock the ability to save bars when smithing.". When you save a bar you get the message: Wasteless smithing: <Type> bar saved!
Items that require at least 3 bars:
|Metal||Chance (%)||Average Savings/item||Cost of three bars||Cost of five bars||Cost of three bars with Scroll||Cost of five bars with Scroll|
|Bronze||50% chance||328 coins||1968 coins||3280 coins||1640 coins||2952 coins|
|Iron||25% chance||237.75 coins||2853 coins||4755 coins||2615.25 coins||4517.25 coins|
|Steel||20% chance||140 coins||2100 coins||3500 coins||1960 coins||3360 coins|
|Mithril||10% chance||61.2 coins||1836 coins||3060 coins||1774.8 coins||2998.8 coins|
|Adamant||8% chance||99.92 coins||3747 coins||6245 coins||3647.08 coins||6145.08 coins|
|Rune||5% chance||97.8 coins||5868 coins||9780 coins||5770.2 coins||9682.2 coins|
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