No offense to your image RR (cute abbreviation
), but I can't look at your art piece without feeling like I need to squint. As what Icy said, the contrast between the background colors and the shadow is overly... vibrant. You don't need to change your artwork (colors, hues, etc.) at all, but the lightness of the picture itself might need to be toned down a notch.
The card idea is a bit nifty, but I think it'd be cooler if it affected ALL creatures on your side of the field. Maybe that seems overpowered, but in its current state, it is a bit situational. If it affected all of your creatures, effects from Ice Shield and Turtle Shield can be effectively negated, and we all know how strong Permafrost Shield can be at times...
