Games Workshop have posted a new 40K tactics article examining the use of Monstrous Creatures in the game.
From their website:
The galaxy is full of horrors. And while some are subtle, nightmarish creations that hide amongst the very beings they are preying on, there are also the monsters – great hulking creatures that face you across the battlefield.
In Warhammer 40,000 we call these towering beasts ‘monstrous creatures’. Their size, strength and a host of other unique abilities means they are considerably more powerful than your average infantryman.