''Under A Luminous Sky'' is a ''[[WesternAnimation/MyLittlePonyFriendshipIsMagic My Little Pony: Friendship Is Magic]]'' FanFiction by [[http://www.fimfiction.net/user/Jake%20The%20Army%20Guy Jake the Army Guy]] and can be found [[http://www.fimfiction.net/story/40634/under-a-luminous-sky here]].

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!!Tropes present in this work:

* AloofAlly: Though Bentgrass and Twilight are working towards the same ends, he remains unemotional and detached (though generally polite) in all but a very few circumstances, and will harshly question anyone he believes has pertinent information, even if he was civil to them a moment before.
* {{Blackmail}}: [[spoiler:One of Sheriff Shackle's tactics to cover things up is to blackmail Doctor Well to withhold evidence.]]
* FBIAgent: Special Agent Bentgrass works for the Royal Investigative Service, essentially Equestria's IRS... or, more specifically, its semi-secret Division Six, an [[ParanormalInvestigation "unexplained phenomenon"]] investigative office.
* ForcedTransformation: [[spoiler:Undergone by Angel Bunny and Big Macintosh, in [[BodyHorror an exceptionally unpleasant process]]. ThePowerOfLove transforms Big Mac back; poor Angel recovers his mind, but is stuck in the body of a monster for what might be the rest of his life.]]
* MindRape: [[spoiler:Parchment's tactic for using poor Zecora as a scapegoat for his murders. Even with him dead, her prognosis is... not optimistic.]]
* MistakenForGay: It's mentioned that Rainbow Dash had to fight rumors of her sexuality for a long time. So, of course, when she has to distract a mare that's actually gay...
* PoliceAreUseless: [[spoiler:Sheriff Shackle cares only that he get to his retirement without any undue difficulty. Ritualistic murders in a land of nigh-pacifistic ponies? He'd much rather cover them up- going so far as to blackmail the town coroner- than actually investigate them.]]