i realy love the art but i think it's op
can you tell me the reason?
Why don't you just call it Demon Dog | Demon Hound?
The cards are quite nice--of course there's always technical question about splitting involved. Reminds me of Optimalist's Flat Worm | Planaria card some time back. Why would demon dogs be 
though? And also, do you intend for demon dog to be made available as a standalone card?
about that standalone card, no, the only ways to get it are: by cerberus, twin universe, or hatch.
And about demon dogs of
i was answered the same to ratcharmer
well, i did they from differents elements because if demon dogs be of darkness to affected by eclypse plus her ability will be a bit OP (or at least i think that), other reason is if the two cards will be of darkness, monodarkness decks will see a bit OP too, and the last reason is for the art, the demon dogs seems (for me) more like a some kind of mutated dog 
