Something like mind read would be interesting. It could work like force persuasion in kotor games where it gives you extra details and options in a dialog.
I have always been a fan of Necromancy, but sadly necromancy spells are usually boring and useless. That boring old summon skeleton was only good in Diablo 2. The reanimation spells are hard to make interesting and balanced at the same time. Still there's much more to it than Skeletons and reanimation. Curses, blood magic, demons(summoning, controlling, making pacts.) undead, souls and even self improvement like life extension. Considering that souls are a big deal in this lore, necromancy could have an interesting place in the game.