Attuned crystal orb

The Attuned crystal orb is a better version of the crystal orb that requires 80 Magic and 50 Agility to equip. It is made by Crystal Singing at the crystal bowl in the Ithell district of Prifddinas, requiring 90 Smithing and completion of The Eyes of Glouphrie. This turns an attuned crystal weapon seed and 1500 harmonic dust into the attuned orb, giving 1500 Smithing experience.

With this orb (and another attuned weapon in your main-hand slot), you have a small chance of doing 25% extra damage on a hit. This chance varies with your Agility level and maxes out at 12% at 99 Agility. So at most, this gives it a 3% damage boost over the virtus book, which has identical stats otherwise.

The attuned crystal orb degrades during use. Each orb can do up to 2,500 auto-attacks before it degrades to nothing. Note that unlike regular crystal equipment, attuned equipment does not revert to a crystal seed after its charges have been used up. This makes it last for 125 minutes of continuous auto-attacking, but with the use of abilities, auto-attacks are much less common, and the orb can last for 10 or 20 hours if used properly.