Dan, you miss the strategic potential behind this. You not only lobotomize (which used once can be quite powerful, and naturally you wouldn't run with just ONE mage...), you also get the chance to "steal" an enemy creature ability. Devour, Poison, Improve, Growth, Ablaze, various brutal nymph abilities... it only depends on your opponent. Of course this is nearly a dead card against any opponent who has no creatures with abilities, but you don't know that for sure unless you see his deck.
Also, this card has the same element as Quintessence, which should be a no-brainer combo, and makes the creature's fragility matter much less.