Blue dragon scale

Blue Dragon Scale is an item that can be used in Herblaw to make potions. It is one of the two items in herblaw to be needed to be ground up before putting in a potion; the other being a Unicorn Horn.

What it is used for
A blue dragon scale is used to make weopen poisen, a great thing to put on daggers/arrows for pvp combat. To make it, first get a blue scale from the blue dragons at Zamorak Dungeon. Next, take a pestle and mortar and use it on a blue dragon scale to make a ground blue scale. Put it in a vial with water mixed with a kwuarm. Then take the weopen poisen and apply it to a dagger/aroows to make a poisened dagger or 10 poisened arrows.