this is the single most incredible glitch/cheat in the game.
I have seen alot of people (here and on other websites) saying how you can be invulnerable to magic , if you wear your enchanted armor. There is a way to permanently enchant yourself with EVERY single enchanment in the game , without being forced to carry around un-wanted armor , and items.
Step 1 : you will need at least 4 scrolls of the same kind. At the very beginning of the game , in the IC's market district there is a shop called mystic emporium , there the elf sells 16 of the same scroll. It would be better if you had 4 of the same scroll , and 2 of another scroll.
Step 2 : cool you found a ring (could be an amulet or piece of equipement like a shield) but the enchantement is rather weak (or the armor is ugly) and you dont plan on keeping it , but where is the harm in getting the enchament without having to wear the item???
Step 3 : go into your items menu , DOUBLE-CLICK on your scroll that you have 2 of , then without leaving the menu , drop the enchanted item , now you should have two of them (sometimes the first attempt dosen't work try again).
Step 4 : Make sure you now have two of the same enchanted item , now equip one. You should see one ring highlighted as it is equipped and the other one "un-higlighted". Go into your items menu , DOUBLE-CLICK on the scroll you have FOUR(4) of , and without leaving the menu , drop the UN-EQUIPPED version of the item. You should notice that now BOTH items have been dropped. That means it worked. Pick the items up (if you want) , and try to re-equip the item. You should get a message saying "this item cannot be equipped now" that also means it worked. Check your status menu and the enchantment WILL be there permanently.
EVERY item that can be duplicated CAN be perma-duped. However , i have noticed that in one game i could duplicate the "shrouded armor" and the "black hand robes" but in a later game i could not. I am un-aware of why , perhaps i was wearing the items for too long now but that is speculations. NOTE : do not and i mean DO NOT perma-dupe any of the following enchantments : CHAMELEON , DETECT LIFE , WATER WALKING , NIGHT EYE , LIGHT. You might get tired of those enchaments and will be unable to revert to your former self , unless you reload an old save. NOTE : do not and i mean DO NOT perma-dupe the gray cowl of nocturnal because you will also perma-dupe , the infamy and bounty on the cowl.