//------------------------------//
// Obfuscate 
// Story: Book 1 - The Behemoth came to Canterlot 
// by Equimorto 
//------------------------------//

Shining and Cadence both came out their hiding spot, one on each side of the building, and both struck towards Sombra. Despite this and despite the intensity of their spells, the creature did not seem to be hurt or bothered by them. Him being slightly pushed back by the sheer intensity of them was the biggest visible reaction, yet as far as actual damage went there was very little to be seen. Not none, but very little. Both ponies intensified their efforts, but all that did was push him back a little more. That was before he started charging.
He went for Cadence first. She was prepared for that, and had already prepared a shield. She was not prepared for the way Sombra tore through it in just moments. But it was still enough time to get out of the way, to the purpose of which she took off and flew herself above Sombra. It was then that they learned how, unlike what seemed to be the case for the other mutated ponies, the former unicorn's horn was still in perfectly working conditions.
Cadence barely dodged out of the way as a stream of crimson wide as a tree trunk shot from Sombra's horn and through the air towards her, and she felt the air grow hotter around it even a few metres away from it. She did not have much time to remain idle however, as Sombra soon followed the blast with another, and another still, forcing her to constantly move to avoid getting hit. Even flying behind a building for cover proved to be of little use, as the creature's next attack melted and tore through and past the crystal walls with ease.
All the while, Shining was still firing at Sombra without stopping. In fact he was increasing the amount of energy he put into attacking him. It kinda looked like it was leaving a hole in the thing's weird flesh, but mostly all it did was push Sombra to the side slightly. That was useful, because it made its aim worse, but it wasn't exactly close to what Shining was meaning to achieve while shooting at it with what would have been lethal force against a number of other creatures.
Frustrated with the futility of his efforts, worried about his wife, and feeling himself grow tired from the uninterrupted use of magic, Shining let go of the spell. Instead he focused on something else. His horn shone again, and a small point the colour of his magic appeared on the ground beside Sombra. There that point began to trace a faintly visible line on the ground around the creature, until it had come all the way back to the start. Then Shining widened his stance, brought his head lower, lit his horn brighter, and gave a powerful heave with his neck as he lifted his head.
The chunk of crystal Sombra was standing on, and Sombra himself as a result, were sent flying into the air, completely throwing off the creature's aim on its last spell. It gave Cadence a chance to land and Shining a chance to breathe, then the creature's body fell to the ground and the chunk of crystal fell on top of it. Both of those things would have been enough to kill anything that size. For Sombra, it just meant melting into a pool of black ooze before slowly beginning to take shape again.