Posion - stab that bugger with as much venom as possible!! The ONLY units I have to deal with this brute are my Common Gobbos (with the spider banner), the Arachnork, and any unit I cast my posion spell on.
To be honest Forgeworld has no business messing with Fantasy - Warhammer has been a great edition with:
Orcs & Goblins
And also the add-ons
Storm of Magic
Blood in the Badlands
Now Forgeworld have started their books and FOR THE MOST part are pretty balanced, fun, and add some depth to our beloved hobby...
With some STRONG objections!!
The K'Daii Destroyer is one such stupied beast - were the rules just make it silly.
The Saurus big monster is another one - he's got great stats, has special rules AND for a mere 75 points becomes etheral - Oh - he can also ambush and have swiftstride!
It's crap and we know it - why introduce units that swing the balance so far to one side - it makes no sense that you have to invest considerably more points to deal with a single unit.
The Warhammer Dragon, fluff wise, is one of the most powerful beasts out there - but it can be dealt with.
Hydras and Abombinations even can be dealt with