The only power she has is shapeshifting.  Her skillset is extensive I'll grant you that.  I've been thinking of dropping being able to shift into an animal, since we have another character with "animal mimicry".<br/><br/>I guess it depends on what you mean by "powerful".  She's on par with Mystique/Captain America/Black Widow, as far as power level.  Her regeneration isn't at the level of Wolverine's or the other character who has regenerative powers.  It isn't instantaneous, as it requires concentration and time.<br/><br/>Powers don't make a compelling or interesting character and I'm worried that people are focusing too much on the power set and not enough on making a well-rounded character.