Mawloc
A Mawloc is a huge worm-like Tyranid creature that burrows deep underground to bypass enemy defences and then emerge to behind them to rampage through their supply lines, command posts, or artillery batteries, only to vanish back underground to evade retaliation. Severe tremors are the only warning of a Mawloc attack, which makes defence duty on a seismically active world a nightmare.
Physically, the Mawloc is an incredibly simple organism. Its six limbs are small and lack the reach to be efficient in combat, but are incredibly powerful and employed to gain traction while burrowing. It attacks by swallowing prey whole with its massive razor-toothed maw. Larger foes are pounded flat by its muscular tail before being devoured. Despite its immense size and mass, the Mawloc is incredible agile, and is able to weave through incoming fire with fluid grace. A Mawloc is almost entirely blind, and relies on a series of pressure-sensitive organs that run the length of its flank, which provide the Mawloc with a many-layered and ever-changing picture of the world around it. A Mawloc's senses are so delicate that it can absorb and interpret pressure waves as they travel through both solid and liquid matter. They are able to detect even the slightest tremor, and intercept their quarry with unerring speed and accuracy. The more regular and rhythmic the sound, for example, the pounding thump of a terrified heart, the more likely that the Mawloc will be able to home in on the source.
