First thing I want to look at, how good is the card without the attack bit? Terminal nothing now, Hunting Grounds next turn. Or, I think a useful thing for duration cards, playing one every turn is like playing.... a smithy every turn. But you need to get two. And this misses the shuffle more than smithy. And it costs 5. In return, you can maybe set up something where you're getting some monstrously good hands and some very mediocre ones - but I find that, at least with most of the other duration cards, I much prefer having them split than gobbed up together. (Tactician is the obvious exception)
Soooooooooooo... the attack better be very strong for this card to be good. I mean, this is some amount of draw, it's probably not the worst thing ever, but I doubt it would be strong without the attack being at least fairly good. How good is the attack?
If an engine has some kind of discard (even warehouse will often be good enough) or trashing to get rid of its green cards, this doesn't hurt. Big Money decks are somewhat inconvenienced, but late in the game, the hands where you do have lots of money, you won't have to keep many cards in hand, so it ends up being not too dissimilar from Bureaucrat. The hands where you have lots of green cards in hand, you probably don't have that much money, you just forego your buy. Now this is a real cost, don't get me wrong - not getting a gold can really hurt, not getting silver hurts a reasonable amount early on and a tiny even in the late game - but it's not the hugest thing ever; pretty mild as attacks go.
On top of all this, the attack can actually just aid the player being attacked fairly reasonably. If I am overdrawing, I can seed my next hand by not playing some actions. If I have one of those super hands in a Big Money deck, where I am wasting a bunch of cash because it all clumped up, now I get to spread it out.
Overall, I expect the card to be rather weak. Not unplayable, by any stretch, just rarely the thing you actually want. I guess when it is good, you will probably know, and it can be fairly decent there.