Wizards will also be able to cast a nifty new Divination spell called Contact Other Plane. Basically, it allows the caster to contact a supernatural entity that can answer questions and offer advice about the party s current situation. As each chapter of the game progresses, the spirit the caster contacts changes. In one chapter, it may be a tormented spirit. In another chapter, it may be a coldly efficient modron.
Clerics also have some powerful new spells.
Undead Ward is one of my personal favorites. It creates a barrier around the priest. All undead who enter the ward get a turning attempt against them as though the priest were actively turning. In the mean time, the priest can perform any other actions he or she wants. Druids have seen the most improvement, in my opinion.