shikobass: what is the best spell in gothic II? and how can i get it?
There are two kinds of spells in G2: scrolls and runes. All classes can use scrolls, but only mages can use runes. Paladins have I think 4 runes they can use.
Transformation scrolls can help you sneak through areas or kill things, but there are only a few of them, and you can't loot bodies while transformed. Damage spells are alright, but they're not that great until near the end of the game.
Mages have 6 circles of magic and, assuming you're playing NOTR, you can only learn one circle per chapter. This means you can't learn the most powerful circle 6 spells until chapter six at the end of the game.
I find summoning runes to be the most handy, but everybody's playstyle is different. While you can find a few runes lying around, for the most part your mage will have to spend learning points to learn whatever spell you want.