Hypnotic Specter costs 3 mana for a 2/2 evasion creature. When he connects with the opponent, he loses a card at random. Dark Confidant costs 2 mana for a 2/1 creature with no special abilities. At the beginning of your upkeep, you get to draw a card and lose life equal to it's converted mana cost.
Dark Confidant's ability is actually better most of the time than Hypnotic Specter, simply because you don't have to rely on successfully dealing combat damage to draw your cards. Sure, it's nice to deal damage a little more often, but I'd rather be up the extra cards than I would batting them for two - damage sources are relatively easy to come by. Being able to draw extra cards, and thereby win attrition wars against another aggressive deck, is going to be key a whole lot. If they kill that guy, that's one less thing that can kill your Negators and Shades. If they don't kill that guy, you're going to grind him under.
