Blizzard Entertainment gave us 20 gameplay screenshots of the Demon Hunter, Barbarian, Witch Doctor and Wizard in which you can see their spells and abilities in action.
One of the screenshots shows the ghost of King Leoric’s beheaded wife which gives you a quest.
The Hydra spell is back with the Wizard and depending on which runes you use you can customize Hydra in awesome ways. I will touch on runes, and traits soon from what the developers said at Blizzcon.