Mawloc

'''Mawlocs are huge worm-like creatures. they are outriders to the Tyranid swarm, and burrow deep beneath the ground to bypass the enemy's front line defenses. Once past the outer perimeter, a Mawloc bursts forth in a shower of dirt and shattered stone to run rampant through supply lines, command posts or artillery batteries, only to vanish back below ground as foward units are recalled to the fight. Severe tremors are the only warning of a mawloc attack making defense duty on a siesmicallymactive world a particually harrowing experience should a hive fleet enter the system. '''