[Mr Flibble]

Well, I have read the manual, but I guess I just don't understand what it means (I have not played D&D in any other form than the BG games). So...

When it says:
-More spell levels available (eg. you cannot learn 9th level spells with INT of 17 or less.
Is this referring to being able to have more spells in your spellbook? For example, I could have 9 spells of Level 5, and now I drink the potion, and I can now have 12 spells in my book for level 5? And do they disappear after the potion wears off?

-Higher "to learn spell" percentage (100% at INT of 24)
Not sure what this is at all... unless it refers being able to copy a scroll to your spellbook. If so, I find this nearly useless anyway because I have never failed at this.

-More spells to learn per spell level (all at INT of 19)
Does this mean if my mage has only 2 level 8 slots for casting, drinking this potion would allow me to cast more lvl 8 and maybe some lvl 9 spells (for the 12 hours)? So, if I drank the potion, picked the spells I wanted to be able to cast after my resting, and then rest, I would be able to cast those spells? And do these 'learned spells for the day' disappear after the potion wears off?

Finally, I did look in my BG2:SoA manual, and didn't find what you were referring to on pg 118 (or 11, or 18). This is the manual that came with my game, so if you are referring to something else, please let me know what it is. Thanks!