Super Nothing
Member
Poisoned blade seems to be more about inspire synergy and less about merely buffing your weapon's attack by 1 each turn. Really looking at it the wrong way imo.
So the way I think about the card is it could be really good, or really bad, based on what inspire cards we get. What if there is an inspire card: heal the hero for 4? That would create awesome synergy imo.
In short, while the damage it puts out is not irrelevant and is a big part about how good or bad the card is, can't ignore the purpose the card would be played for which is inspire synergy imo.
Poisoned Blade would still be shit. I'd run that inspire self heal card and just use my hero power without that 4 mana pile of garbage.