The guard dodged to the side as the wall crumbled where he'd been standing just moments before. He tried not to think about the sickly black tinge of the ground below him, knowing he had no alternative but to walk over it if he wanted to get to safety. If there even was safety anywhere. He tried to look around, seeing only more destruction close to him, but he was quickly distracted by a guttural roar close to him. He turned and saw the nightmarish creature advancing towards him.
He hurled his weapon forward, but it merely bounced off the monster's skin. It was closing in on him with heavy steps, a deliberate slowness in its motions. The pony knew running away was not an option. He wouldn't be fast enough. He decided he would stay instead, and try to fight the creature. He would at most get a useless kick in and he knew that, but he refused to turn around and have death come without him looking at it.
He didn't really have a plan. The monster was bigger than him, and by the way the spear had bounced off it probably wouldn't even flinch if he tried to hit it in any way. If he'd had wings he would have flown away from there, as risky as flying was with the black storm winds that had began to fill the city. Not that he would have known where to fly towards. With the central tower fully destroyed, and after the commotion that had passed, it was hard for him to tell what was where.
The creature stepped closer. The guard realised he would need to guess when to dodge out of the way if he wanted to try that, because he wouldn't be fast enough to react to it once it got close enough to hit him. That was assuming it didn't pounce on him from where it was already, which it could certainly do. He swallowed, legs tensing as he looked intently at the mutated pony.
He didn't have to jump out of the way, though his built up tension still made him jump a little at what happened. Before it could get too close, the monster was violently struck by a blue and silver blur that crashed loudly into it and shoved it metres back and onto the ground. Standing over its body, Rainbow Dash then pulled her sword out of where she'd embedded it in the creature's chest, causing a spurt of black blood to shoot out of the wound like water out of a sputtering faucet. Some of it matted her mane, but what landed on her silver armour slid off to the ground leaving the polished metal spotless.
After ensuring the creature was really dead, seemingly from a combination of getting a sword shoved into its chest to the hilt and the sheer force of the impact derived from Rainbow's speed, that had led to cracked and broken bones and probably some severe internal damage, the mare turned around to the guard looking at her. "Let's get you to safety," she said, quickly trotting towards him.