From DDO wiki
This item currently cannot be fed to sentient jewels and probably should be able to.
|Use Magical Device DC|
|Durability||250 / 250|
|Location||Tower of Frost, End chest|
|Description||This Rune Arm belonged to a very literate wizard in a tower. All of his read tomes are fed into this machine, and the supply seems endless.|
|Notes||The Book Shot is a rare instance of a ranged Bludgeoning attack.|