I had forgotten all about that old future sight common. Still, the reason I say so is because you'd have to actually wait until the turn after she was played to start reaping the benefits of her ability. If you did manage to untap with her then she could definitely end up being a valuable source of card drawing. The thing is: it may be a cheaper, reusable forsee; but you'd have to wait an extra turn and pay in a grand total of 6 mana before you'd start feeling her effects. They'd stack up rather quickly if she was allowed to stay but who's to say by that time she'll still be there or YOU'LL still be there?