The cost is so...
cheap. And for ANY 1/2 quanta?
In some decks, this card will be a lifesaver (cheapening costs, increasing the strength of creatures, adding more effects to upgraded cards, etc.), but then again, I'm not sure how people will the like the concept of going into a game where both players have non-upgraded cards, then someone uses this, and then has a very distinct advantage over the other guy because of the free upgrade.
Not to mention, this could dramatically affect how Chaos Seed/Power is used.
Otherwise, up the cost. It costs 1500 electrum to upgrade a card, and assuming this isn't rare, you can just buy a couple of these to gain an 'upgraded' deck whenever you play.