Dracomimus Rex

This monster's name means "Dragon mimic king". Henry Wu created it from a huge number of different species' DNA, but it most prominently used T-Rex, Diplodocus, and Dilophosaurus. It is huge, standing 15 feet tall to the arch its back (21 to the top of its head when raised) and 50 feet long from snout to tail. It can't breath fire, but it can spit a corrosive poison. Whoever thought creating this was a good idea must have been out of their mind.

As for the build, it uses 1227 pieces and is fully poseable (though it probably needs a physical stand to actually stand up). It was created in Digital designer in 10 hours over 4 days. The pictures were rendered in Stud.io 2.0.