How to add a spell?
 

Hello
How to add to my game a spell geyser?

You dont have that spell available in game?
I dont know how to edit save game file to add some specific item/scroll etc in game already started.
But you can do next : shift key + tilda (~) , little chat window will open, there type `magicbook` and press enter. This will give you all spells in game in your spellbook, and 7 scrolls of every spell. So then you can destroy/sell scrolls (gold was never big problem in this game). As for spells you get and didnt want them ... well, dont use them. I have no other advice for this particular problem :-(

Yes, I think it is the best idea.
Unfortunately after 75% lenght of the game I've noticed that game didn't generate geyser for my mage on impossible level :/
Thanks.

Well at that stage of game, you already have almost all spells, so `cheating` geyser in wont be to big of bend in the rules :-P
Have fun :-D