Nice idea. As an inverse of blessing it could be an effective card. Atm this version is quite weak and somewhat negligable in deferance to permanent lobotomy or kills from cards like Liquid Shadow and Siphon Life.
To make the card more useful I think you should make it a true inverse to blessing and have the effect issue a -3/-3. Unlike other games like Magic where inverse cards need to be adjusted in their effective result , elements does not predicate creature to creature combat. Blessing offers creatures exagerations on abilities with creatures like Otyugh but this card in its current form cannot counter that benefit in any way.
Shame is a niice name but an antonym to blessing would be something like hex or curse or maybe even Dark Blessing.
When using any card in elements that reduces attack power, it needs to be decided if there will be a lower limit. I think that negative effects are nice in elements so sending an Otyugh into a -3 healing machine for you is a good thing.
The cost will need to come up to reflect blessing if you do add the -3 to HP with 3
/2
respectively. If you choose to retain its current effect, then it is too expensve as is and needs to come down maybe to 1
, and then free.
As for art, and being an inverse of blessing, Why not a reflection of the blessings art with vampire wings and a dark star center.