What kind of deck do you build around this? Highlander limits options a bit, but could still be maybe a dragon-focused midrange/control style deck... And then, would the hero powers be worth it? Hmm...
Paladin, Warlock, Warrior (For high tempo, free cards, and infinite armor)
Rogue, Druid, Mage (it's huge to do 2 damage to anything freely, fills out turns you want to do nothing too)
Shaman, Priest, Hunter (All value over time. I'd consider Priest and Hunter decent, but not great. Healing minions is good and face damage over time could stack up...)
If only 3 hero powers are "bad," considering the playstyle, yeah this card might be worth it. With a ~1.1% chance it's exactly the bottom 3, it's still good, and a ~24% chance you never see the top 3. It's almost always good.