Phase Shield makes you shift out of phase, therefore making the opponent miss you. No matter how accurate, I don't think this Ninjatsu can attack something that is out of phase.
However, I think you can give it "Ranged" as a passive ability. That way, it can get past Wings while it is in the weapon slot, just like Eagle's Eye.
Btw, you have this card as a spell. Better change it to a permanent.