Yeaaaahhhh.....
This is essentially a momentum without the shield-ignoring part, since all it does is reduce damage-reduction by 1 (if I'm interpreting it correctly). Supremely underpowered.
We already have momentum, and it can be played off your mark. Water has Chrysaoras which ignore shields (0 attack) and poison (ignores shields), so....yeah. Pointless, card, really.
*hug* Don't feel bad, the art's really pretty