Dragonscale Whetstone
Certain preserved dragon scales can take on magical properties, either naturally on their own or with the help of a skilled artificer or enchanter. These whetstones are made of such a scale and appear almost gem-like in appearance.
You can use a dragonscale whetstone over the course of 1 minute to sharpen a bladed weapon (such as a longsword, battleaxe, or spear), granting it a variety of bonuses as shown on the table below. The bonuses remain for 1 hour and depend on the whetstone's rarity and the kind of dragon it originally came from. These bonuses are in addition to any other bonuses a weapon may have.
A whetstone has 5 uses. When you use the last use, it loses its gem-like shine and becomes a nonmagical scale.
| Dragon Age | Bonus Damage | Rarity |
| Wyrmling | \+1d4 | Uncommon |
| Young | \+2d4 | Rare |
| Adult | \+3d4 | Very Rare |
| Ancient | \+4d4 | Legendary |
| Dragon | Bonus Damage Type |
| Black | Acid |
| Blue | Lightning |
| Brass | Fire |
| Bronze | Lightning |
| Copper | Acid |
| Gold | Fire |
| Green | Poison |
| Red | Fire |
| Silver | Cold |
| White | Cold |
You can learn a lot about a warrior by their blade. However, the real testament to a warrior's mettle is not in the blade itself, but in the lengths they go to tend to it. A warrior with the well-used whetstone is far more fearsome than a warrior with the mightier blade.