Ok after seeing what these guys can do on the GW official site I had to convert
me one.

They get 2D6 attacks, monsterous creatures so no saves, plus tusked, tail etc.
Your looking at over 16 attacks possible!

No Saves!
And the new 5th addition allows this Carnifex to Charge accross the table at 12 inches per turn!
Yep as he has no shooting weapons just move again another 6 inches in the shooting phase to get yourself accross the table and into HTH faster!

Run into some Terminators 16+ attacks no saves so the terms have to use
there INV. Saves. So 16 attacks at INV. saves is a lot of deat terminators.
If they cant kill him first.

Dang.
Crushes tanks, vehicles shoot ANYTHING that gets in its way.
Its about the most powerful Carnifex around!

So I wanted mine to be cool.
So I bought some of the Forge World Big Crushing Claws.
And I made mine stand up more upright with his head arched up as if
ROARING!! before he attacks or set him up next to a flipped over tank as
if he just tossed it!

Anyways who knows I just like the model and the rules are outstanding
as well.
Here are some pics.

Thanks.