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This was a Ubi project for China, but the Chinese developers reworked a lot of things based on Nival's developments and added a lot of cool content of their own.
That demon isn't from that game. And certainly not from the beta.
Regarding importing into Heroes of Might and Magic V, it's very easy to do, but I don't want to deal with other people's models anymore, and I wouldn't advise anyone else to either.