"[color=a187be]Stand back, I can take it from here...[/color] " Adrianne suddenly spoke over the comms as the Psyker stepped out from behind the heavy gothic pillar.

She had watched the group dispatch the minor group of greenskin with noisy but brutal efficiency. There was only one Ork boy left at around the anti aircraft gun. 

The Ork in question had taken one look in their general direction, then down at the large heap of metal in his fat hands that he called a 'shoota', before concluding "Zog dis, Iz need a biggah one!" and making a beeline for the protection of the armored panels of the heavy anti aircraft gun, disappearing from view. The four heavy barrels of the gun started to move slowly in their general direction just as the Ork vanished, as they could hear the frantic swiveling of a rusted crank from the other side as the ork tried frantically to bring their anti aircraft gun towards them.

The Psyker, on the other hand, strode out into the open.

Raising her staff and pointing it towards the anti-aircraft gun, she took a second to concentrate, whispering a low, eldritch chant, before uttering a single world.

[i]"[color=a187be]Malleus.[/color]"[/i]

The word seemed to have an almost ethereal ring through it to anyone in the vicinity, as if it traveled straight past helmets and earpieces and scratched the very surface of their minds!
In an instant, a bright, violet flash would appear from the tip of Adrianne's staff; accompanied by an unnatural shriek that seemed to emanate from nowhere and everywhere all at the same time; as a twisting and sparkling violet ectoplasmic ray fired out of it! It arched and dashed madly towards the anti-aircraft gun as it was swiveling towards them! The psychic ray made contact, hitting the armored plate and barrel of the anti-aircraft gun, and when it did, it surged and melded across the lower end of the barrel and plates, acting much like a supernatural plasma cutter! 

A large section of the core of the gun, alongside multiple parts of the armor and barrels were promptly melted, a fine pink smoke rising from where the metal was turned into liquid! 

The Ork behind the armored front plates of the gun was annihilated instantly as a part of the ray punched through the heavy plates in front of him, severing his arm in a psychic surge of searing energy! The Ork barely managed to let out a howl as the energies moved to the rest of his body, causing his torso to explode in a viscera of gore! The Ork's howl could still be heard for a moment even after his physical body had been destroyed, a small green light visible before it was quickly snuffed out behind the gun.

"[color=a187be]Greenskin anti-aircraft gun destroyed. They won't be using that one for a while.[/color]" Adrianne said as she took a step back to turn towards the group.

In a straight path between the psyker and where the ray had traveled to the gun, the ground was suddenly corroded and withered in a straight line. Sides of metal cogs and plates had rapidly started to rust, parts of rocks turned to dust, and slight, purple ghostly motes hung in the air. And the gun itself was a ruined, half-melted pile of metal.