The walls of the ravine dropped away in front of him suddenly, exposing a massive drop, and without hesitation Burias leapt, clearing the five metre expanse with ease, landing smoothly and continuing his kilometre-eating pace. His mental map of the area told him that they were close. He heard the heavy thump of mortars and picked up his pace, snarling.
He scrambled up a steep, near vertical, rain-slick incline without pause and leapt from the top to a nearby boulder, and from there to another. Up and down the broken, steep ground he traversed, leaping and rolling, always in motion. The mortars thumped again, closer this time, and he leapt onto a steep wall of rock, pulling himself swiftly up. The cliff-face angled beyond vertical, a dangerous overhang with a drop of hundreds of metres. With a snarl, he kicked off the rock face, lunging for a handhold near the lip of the rock. He grabbed it one-handed and hung there for a moment before he secured another handhold and hauled himself over the edge.
Burias paused, crouching for a moment, scenting the air. The rain dulled his senses somewhat, but the taste of meat in the air was strong. Then he was moving again, running along a thin ridge of rock barely two hand spans wide. The drop on one side must have been almost a thousands metres, but he traversed it at a full run before dropping behind some boulders. Glancing down, he grinned and looked back the way he had come, seeing the dark shapes of several of his brethren racing swiftly across the rocks. The thud of mortars was right beneath him.
He leapt from his position out over the drop, landing on a ledge on the other side. He waited for a few breaths, and then launched himself over the edge. He landed behind some large rocks and waited for the heavy weapons to fire once more. As they did, he rose from his position and ghosted up behind the Guardsmen, who were still oblivious to their imminent demise and were quickly reloading the six powerful mortars set on the rocky ground.
Grabbing the first Guardsman from behind by his helmeted head, Burias pulled him violently backwards, ramming his massive knifeblade into the base of his neck. The blade, easily the length of a man's forearm, severed the spinal cord and continued up into the brain. Burias hurled him away.
The other Guardsmen gaped in horror at the red-clad devil in their midst, even as Burias leapt amongst them. He ripped his blade across the throat of one and plunged it into the neck of another with the return, backhand motion.
Another Word Bearer loomed up behind the group, and a further Guardsman died as a bony, bladed arm was rammed into his back. The daemon within that warrior-brother had already surged to the fore, Burias saw, as the possessed Word Bearer ripped the fallen Guardsman's throat out with a tusk-filled, gaping wide maw.
Feeling Drak'shal begin to surface as the daemon responded to the presence of its kin, a jolt of daemonic power and adrenaline shot through Burias's body. He snarled and leapt at the remaining Guardsmen, who had recovered themselves enough to have drawn laspistols, at least those that were not already scrabbling over rocks in a vain attempt to escape.
Las-fire streaked past Burias's head, singeing the skin, and he grabbed the offender's hand, crushing bones as he turned the pistol away from him. Pulling sharply forwards, he ripped the man's shoulder from its socket and drove his blade up into the man's stomach, twisting it mercilessly.
A blast of las-fire struck him from behind and Burias turned, hurling the body of the man he had just gutted into the shooter. The power of the daemon within rose screaming to the surface and Burias-Drak'shal leapt on the man as he tried to rise. He lifted the trooper into the air, holding him by the head and the groin, and he brought his hands together sharply. The man was neatly folded, his back cracking sickeningly under the force.
Other possessed Chaos Marines leapt from the rocks above, crashing down through the rain to land amongst the enemy hacking and slaughtering, ripping and rending. Blood sprayed the rocks as the Guardsmen died.
Letting the power of the daemon overcome him, Burias-Drak'shal and his possessed comrades slew until there were no more foes to kill. He stood, chest heaving for a moment before leaping off through the darkness on all fours, scenting other enemies nearby. He howled into the night and felt the rest of his pack spread out to either side of him, to encircle the next gathering of meat.
Heavy bolter fire tore through the Guardsmen, taking down five men in a screaming burst. Their bodies were ripped apart, bolts tearing through armour as if it were made of paper, and punching through the soft flesh beneath. Blood sprayed out, and Boerl swung his head to see a massive armoured shape turning its rapid-firing guns in his direction. It was at least five metres tall and nearly as wide.