THIS CREATURE IS IN NO WAY RELATED TO TAU OR TO WARHAMMER, IT IS SOMETHING I COMPLETELY MADE UP AND IT JUST HAPPENS TO SHARE THE SAME COLOUR SCHEME.
XD its not officially the tankosaurus rex, but that's awesome enough to be a working name for now.
This here is the pride and joy of the biological weapons division of Xasheen R&D, they take one of the largest reptiles native to their world and -after cloning it and cybernetically augmenting it- cram jam it full of their heaviest weapons, such as the mass drivers you see here :3
Put in a Xasheen hover tank in for scale, just to prove to you that these guys mean business.
Xasheen (c) Me
EDIT: Cleaned it up a bit and added some moar skin details
EDIT 2: It is no longer Tau-y and I gave the Tank some camo
EDIT 3: Decided not to care about the Tau-y-ness and added some crimson details.