Comparing my idea with Your or with linked posts is like comparing Cockatrice with Psion
Both has got the same stats, but both are different.
My idea works against positive and negative effects. Your no. Is it really easy to say which effect is negative/positive? Is Mutation on RoL positive? Mutation on Dragon also? Liquid Shadow is positive?
Your upped card idea looks more similiar to Quint. Your card protect against bad effects. My card remove bad/acquired effects. It is like comparing Explosion with PA.