The Sapphire upgrade of the Strange Rune Bow, increasing heavily its attack speed, making it the fastest attacking bow by far. Only obtainable in the Hidden Mines of Al-Aziz by handling a Strange Rune Bow and a Qualis Gem. The bow is not used by any troop, so its up to the player for this bow to exist.
Note: in 3.8.4 and previous versions, damage was 40, accuracy 95 and shot speed 95.
(See Rune Weapons)