Enchanting Item with Bonus to Intelligence (For Spellcasting Purposes)

[Refplace]

Originally Posted by ULFGARD

There are ways of making it less attractive as an item. I've had a game where characters got a +5 IQ ring (that did not add to spells, but even so). Basically it made the wearer hyper intelligent, but they then had trouble relating to people who were less than their original IQ+1. They'd use big words, would not explain "obvious" steps in plans, etc., effectively giving them an odious personal habit.

I like quirking such devices similar to skill and IQ chips.
Add in a few mental disads and it can really affect desirability while still allowing it and flavor for those willing to risk it.