Though spirited, the last of the eldar defenders broke against the brutal determination of Vulkan and his praetorians. Maimed and mangled aliens lay cold behind them. Memories of Breughar’s death at the cruel blades of the eldar witch surfaced inexplicably in the primarch’s mind, stoking the flames of his violence further. He barely saw his enemies anymore. Their identities were lost to him, subsumed collectively into the face of the female slaver.

“Primarch.” It was Numeon who brought him back again, loyal, steadfast Numeon.

Vulkan gripped his armoured shoulder. “I’m sorry, my son, the fires of battle overcame me for a time.”

Numeon needed no explanation. “We are here.”

Luminous blossoms of energy flashed along the shield as the Iron Hands tried to crack it open. Bolter shells exploded impotently against the inviolable surface, whilst flamer bursts and heavier fire had similar effect.

Ferrus Manus swung Forgebreakerand the weapon rebounded harmlessly. Seeing Vulkan in his peripheral vision, he turned.

“Any idea how we bring this thing down?”

Vulkan looked through the transparent psychic membrane. Despite the continuous chanting, the eldar witches were beginning to show signs of fatigue. Sweat veined their pale, eldritch faces and they grimaced with extreme concentration. Their strength was fading.

He hefted Thunderhead, enjoying the feel of the grip and the sense of its power. “I was going to try hitting it over and over again until it cracks.”

Ferrus grinned, a rare sight on one so serious and taciturn. “It’ll be like breaking in a new anvil.”

He was about to swing again when a deafening screech radiated from above, shaking the entire jungle canopy for kilometres around. The earth trembled as the screech became a throaty, bestial roar. In that moment, the light died like a cloud obscuring the sun. At the threshold to the arch, a dappled light had fallen on the shield, lending it a brilliant sheen. It disappeared in an instant as something vast and terrible eclipsed it.

A noisome stench had filled the air, making it heavy and thick. Looking up into the benighted sky, Vulkan wrinkled his nose. It emanated from a monster. The massive shadow descending towards them was shaped like a pterosaur only much, much bigger. Though it barely moved its membranous wings, the downdraft pushed the advancing Phaerians to their knees. Some stayed like that or sank further, huddling in foetal terror. The Legionaries stood their ground with the primarchs, appraising the beast coldly through their helmet lenses. A bleat of reptilian voices snapped at the air as a flock of smaller pterosaurs appeared from behind the pteradon’s incredible wingspan.

Ferrus Manus levelled his hammer at them.

“Scything rain!”

The Morlocks released a bolter storm. Whirling and shrieking, the pterosaurs were torn apart. Several stray bursts exploded against the thorny hide of the giant pteradon, which only maddened the beast further. It was gnarled and old, like some monster of myth made flesh. Myriad scars stitched its leathery torso and a vast horn, dark with age and blood stain, jutted from its bony snout. Talons, as long as the primarch was tall, curved from rough-hided toes. Umber-coloured scales, thicker than any battle-plate ever forged, scalloped its back and limbs, while a long prehensile tail ended in an axe-headed barb.

Impressive as the monster was, Vulkan’s attention was drawn by its rider.

“There you are…”

The female seer had bound this creature to her will and saddled it. Incredibly, she needed no hands to ride the monster and carried an eldritch staff in one and a glittering rune-blade in the other. Garbed for war, her intent was obvious as she glared at the two primarchs.

Vulkan removed his drake-helm, wanting to meet the monster eye to eye, and his face curled into a snarl. “We must kill this thing, you and I.”

A primordial roar drowned out the Gorgon’s reply, showering its enemies with hot saliva and reptile stink. Men quailed. Some soiled themselves and fled. The Legionaries opened fire. Brass bolter shells erupted like fiery blooms across its ribbed belly. The beast rose to its haunches, wings splayed like some saurian angel, and then slammed the membranous tissue together in a thunderous collision. A deep throb raked the air, carried by the dull boom resonating from the point of impact. A tempest was unleashed upon the Imperial forces. Phaerians and officers alike were flung back screaming, their innards pulped by the massive shock wave. They spun, doll-like, limbs flailing brokenly in the hurricane. Trees bowed, bent and ripped apart. Severed trunks and clumps of scattered foliage impaled tanks and flattened entire cohorts in the savage welter of debris. They resisted determinedly, but even the Legionaries were sent sprawling, a thick and dirty cloud spilling after them.

Ferrus grit his teeth, standing his ground with Vulkan. His rage was written loudly upon his face.

“I have no quarrel with that, brother.”

An arena lay before them, of ragged tree stumps and flattened jungle flora.

A gritty patina washed over their armour and surrounded the beast like a low-lying, earthy fog. It glared at them, expressing its ancient hate and malice, dwarfing the primarchs utterly.

“Try again, monster,” said Vulkan, dropping his voice to a predatory rumble.

He heard a low whompof displaced air and registered a blur of sudden movement in time to slam into Ferrus Manus and bear him down. A scaled, gnarled mass whipped overhead as the pteradon’s axe-bladed tail narrowly missed the Gorgon’s exposed neck.

Vulkan was quickly up on his feet and moving. “Don’t lose your head, brother.”

Ferrus scowled. “Worry about your own. It’ll take more than that to cut my flesh.” He was moving too, making for the pteradon’s blindside to flank it.

Its monstrous size and strength were formidable advantages, but with its enemies splitting up it couldn’t bring them to bear against both. Emitting a reverberant screech, it went after Vulkan.

Hunting monsters was second nature to the primarch of the Salamanders. Nocturne was lair to many scaled and chitinous horrors. As a boy, Vulkan had slain them all. Even the drake he wore as his mantle was huge, but this… this was a behemoth.

He lost sight of Ferrus behind the pteradon’s bulk, but stayed near to the beast to deny it its greater reach. The brackish reptile stench was potent close up. Mortal men would have gagged on its foul aroma but Vulkan had ranged the steppes of Mount Deathfire and endured its sulphurous vapours. This was nothing to him.

A hot chain of sparks flew off the primarch’s armour as the monster caught him with its talons, before he turned and smashed Thunderheadinto its flank. Its scales buckled and snapped. The cracks in the monster’s natural armour filled with blood, and a shriek of pain tore from its throat. A heady coppery scent dirtied the air further, and Vulkan knew he’d hurt it.

Keep moving.It was a mantra in the primarch’s head as he chased along the pteradon’s flank. Stop and we die.

No man could hope to face such a monster, let alone fight it. Primarchs were more than men, more than Space Marines.

They were like unto gods but even gods could fall.

As if hearing his thoughts, the monster came again. It lunged, and Vulkan narrowly avoided the razor teeth. He came up for a retaliatory strike, but the beast snapped at him again and he dropped his shoulder to dodge. It used its bulk to slam into him and Vulkan staggered before edging back.

Teeth as long as chainblades and drooling with saliva loomed in the primarch’s eye line.

He swung Thunderheadin a narrow arc to loosen his wrist, readying to crush the monster’s neck, when a clutch of roots spewed from the earth to trap him.