Seems odd at first glance, why would you need +2 if you have passed? My initial reaction was that it would help land Double or Nothing but it doesn't actually help there, because of how that works (it doubles the difficulty rather than you needing to get double the target).
It does combo with cards where you need to succeed by a certain amount:
Opportunist (though this seems a pretty poor use)
Rex Murphy's trigger
(I might well have missed a couple)
Ultimately none of these uses are that mind blowing. I think a card that only works in combination, and only provides lukewarm benefits even if you draw the combo together is pretty weak.