> Also, is there another thief character other than Heric that I can
> pick up to cast more of these spells?
>
> Yes there is Ophelia who can cast
Level 4 Batch Spell, Belligerence, Invisibility,
Level 3 owl eyes, Stealth, Greater revelation,
Level 2 materialise, Holy Flame, levertation, saving throw,
revelation,
level 1 alchemy, magic candle and magic compass

and all this is when Ophelia is at level 14

All the best glg138.