I hope someone can help me...........Dak'kon and Morte are dead....I'm seventh level fighter.....I'm about to go into the Warrens of Thought......when do I get the raise dead ability?

Ouch...
You're a bit late. You get the Raise Dead ability from Deionarra at the start of the game, in the Mortuary if you talk to her right. You might wanna go back and get it out of her. It's one of the most useful abilities you can get. Besides, raising dead costs a lot of jink otherwise.