[Engineering, Magic, and Kitsune] Chapter 76: Sentinel

Originally posted on r/HFY by u/SteelTrim. [First](https://www.reddit.com/r/HFY/comments/1gvt665/engineering_magic_and_kitsune/) | [Previous](https://www.reddit.com/r/HFY/comments/1tbqm9z/engineering_magic_and_kitsune_chapter_75_socks/) | [Nex…