That was what I meant...
You can see the top three cards of your opponent's library whilst this card is cloaked.
And yours, too... That'd be nice. But mainly your opponent's.
Seeing the top 3 cards in a deck could be tricky to pull off. Not so much because of balance but because it would probably take reworking the game board layout and likely a lot of code rewiring as well.
Its a cool idea, but it could take a lot of work.
Seeing your opponent's cards as they draw them, however, is very doable. It is also distinct enough from precog that it may be safe.
Precog would still be slightly stronger in that it allows you to see what is already in their hand rather than only getting to see anything new that is drawn.
I really like that concept!