2nd squad advanced hurriedly forward eager to gain the cover of a crater before the rest of the stygians could bring the amount of fire down on them that had decimated 3rd squad. As Sgt Rowlins led his men into the crater he felt a sudden rumble.
"Serpent mine!" one of the squad screamed in terror.
Out of the ground burst forth a horrific armored serpent worm. It's jaws biting through one of the guardsmen before anyone could bring a weapon to bear. Two more men were bit and slashed left to bleed to death in the crater even as weapons fire bounced harmlessly off the creatures hide.
Meanwhile the surviving heavy bolter team from 3rd squad and the mortar all took aim at the advancing vengeful stygian reaction squad. Fire chopped a few down while mortar rounds pounded down a few more. yet despite the rain of fire the stygians came on.
Special thanks to Chris Edstrom (pictured below) for all his invaluable help with this battle report.