I was playing in Niryastare and all of a sudden my magicka will not regenerate. I can increase it with a potion but not on it's own after using it. Can anyone help me out?

That's an undead dungeon. Have you checked that you haven't contracted some disease? I seem to recall there being zombies that are infected with something that prevents mana regen. Astral Vapors, maybe?

Also, some mods seem to screw up stats from time to time. If you do not have the Unofficial patch (UOP) get it, and there is an icon in the "Misc." gear section of inventory to open the control panel for the UOP. It includes a "Fix Stats/Attributes" function. I find I have to use it periodically because I use a mod that causes "damage" to stats from hunger/thirst/sleep deprivation, but eating, drinking, sleeping doesn't always reset them. Just a thought.

You have stunted magicka. There are only two causes.

1. The Atronach birthsign. Since it happened to you suddenly, rule this out.

2. Astral Vapors. This must be it then. It is a disease that can be contracted from Dread Zombies. Cure it like any disease (eg: eat a mandrake root, drink a cure disease potion, pray at a chapel alter etc). :dance: