I'm roughly 30 hours in playing a mostly stealth character and I've been wanting to get some of those high level illusion spells, specifically invisibility.

Thing is, the illusion guy at the Winterhold College doesn't have it. He only has a handful of spells, even though my illusion level is around 80 now (got crazy magic regen gloves and have been spamming muffle )

I thought maybe when your skill was high enough more would be available, but I guess not. Anybody know where to find it?

Try Farengar Secret-Fire in Dragonsreach, I think you also need the perk for Expert Illusion

Also 'muffle' is an effect on the 'Nightingale Boots' you get near the end of the Thieves Guild, as well as the 'Shrouded Boots' from starting the Dark Brotherhood, it might be worth going through them to get it.

@Hulsey90: I think the primary reason for spamming Muffle in this case is to level up Illusion... :)

It's an effective way of doing it.

@Hulsey90: The reason for seeking out invisibility was to help for the Thieves Guild, specifically. Not being able to always just stealth arrow dudes made the first few missions pretty tricky.

I actually was able to buy it from the guy at the college today, for some reason. Might have been a weird glitch that didn't allow it to show up, even though my skill was high enough, but I got it.