There is a wind Drowcrusher at Oslya. It's not in the database. I'm afraid I don't know any of his stats, I just know it exists ;)
BTW, why all of the drowrcushers are called "Tyrannosaur" in the database?
Having a signature is like keeping a gremlin.
Just don't overfeed it, don't make it wishy-washy and you'll be a good responsible Signature Keeper :]