Collectible card games (CCG) - ideal category for tokenization & tokenomy. Digital active’s - cards can be realized by ERC721 (or most powerful ERC-1155 token - we have such projects with this standart), internal coins - by ERC20 or ERC 223. So we take 0x protocol for cards & coins exchange and made CCG at medieval dark fantasy setting. Enjoy! Now our alpha works like one hardcoded demo-battle with two races, smart-contrats for bying card-pack and first-look scetch design.