qalkx asked: After having a seen a larger version of the dinosaur art from Challenge 4, I have to say that I still don't see how it's supposed to be an artifact creature. To me it looks like a regular feathered Ixalan dinosaur and nothing more.

There is a similar picture from Kaladesh in slush and I was thinking it was that, not realizing there was a new slush piece from Rivals of Ixalan.