It's very short so far, but I've got some ideas on how to continue it.
[hider=MacKenzie faces an Ancient Bio-Mecha]
Rubble sprayed all around her as MacKenzie leaped from the crumbling pillar. Her grapple hook bit into another piller, and she used the momentum to swing for the other side of the room. The air roared in her ears as she arced past the monstrosity. She collapsed against the marble when her hook found its mark.

A deep rumble behind her told her the giant had found her again. The damn thing was fast - way faster than anything its size had any right to be. Its head alone was nearly as big as she was tall. Yet it moved with the speed and grace of a human. She gritted her teeth and backflipped off the pillar. Its ethereal red sword seared her hair and struck the place she'd just stood.

She balanced on its wrist and darted up its arm. Three arrows snapped from her bow. The mouthless giant groaned when the three shots buried in its left eye. Before she had time to dodge, its other arm came swinging toward her. The impact knocked the breath from her lungs and cratered her into the dungeon wall. The red blade followed close behind.

With the last of her waning consciousness, MacKenzie took aim for the vent in the ceiling. The hook bit, the device whirred, and her body flew into the darkness beyond just as the giant's blade melted off the sole of her boot.
[/hider]