Discord is wanting to settle down with Fluttershy and stay with her full time, but as the god of Chaos he'll cease to be if he acts to normal and it becomes clear that no normal creature can stand chaos 24/7 and he seeks a replacement, he ends up landing on Spike for the job.
Spike is missing all the time he and Twilight use to spend together, even if it was mostly work, and ends up using his powers so he can earn her respect as an equal instead of being seen as a lowly assistant.
While planning his first move he ends up enlisting the Cutie Mark Crusaders aid so none of the other mane 6 feel left out of the fun.
Featured (Apparently) - 8,28,21 - 11,19,22 - 02,19,23
- This Story takes place after Season 8 but before Season 9 -