Quote Originally Posted by Lix Lorn View Post
It's intentional that people can steal the stone. Slightly balancing, hopefully.
Only the relevant part quoted. That has the same problem as Item Familiar, or a wizard's spellbook. Either the DM decides to take it and you suck, or you keep it and you're all-powerful. It doesn't make a good balanced system as it can only go to either extreme.

Also 4 attacks per round are really good at low levels still.