Dude this card is amazing. The chances of getting another copy of Brawl or a few legendaries is a chance worth taking up. You figure you run old school warrior with acolyte this card becomes a must have for value.
It won't copy itself because you cast it, so it's no longer in your hand. However, if you had both copies in your hand, you could potentially go infinite, since you add a third copy to your deck, and at that point you're just limited by card draw.
Warrior can draw a ton of cards with Young Pyro + Battle Rage (that's how Charge got nerfed). Mill Warrior with infinite removal, tons of draw plus Oracle to fatigue your opponent fast seems potentially powerful. I've wanted a card like this since forever, but now I'm wondering whether it's a mistake.