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Twilight Unbound is an Ask a Pony blog run by AdvancedDefense (creator of earlier works like Nicktoons Tales and WALL•E: The Human Touch). It has Twilight Sparkle deal with the Windigoes. After thousands of years they have been gone, they have returned even more hay-bent on making Equestria a frozen wasteland. And now, Twilight must go across the land, with the help of her friends, to stop the incoming threat. But, there is a catch, as Twilight is now forced to turn into a monstrous pony (dubbed Werelight Shine by Spike) every night due to a Windigo spirit getting stuck in her system!The blog's main story is basically Sonic Unleashedin the world ofponies, however, Word of God states that even though it is so, the events that happen within the story are gonna be rather different from that of its inspiration. Word of God also stated that he also had trouble deciding when the story took place within the official canon, but after watching Magic Duel, he finally decided that the Main Story took place before Season 3.Not to be confused with the biography of Stephenie Meyer with the same name.
Bad Bad Acting: In order to get Pinkie off her back in order to save the Cutie Mark Crusaders from the Windigo Spawn, Werelight pretends to be defeated by Pinkie and gives the Baby Cakes back to her. She acts as well as you would expect.
Werelight does it again when the Cutie Mark Crusaders and others are being attacked by Windigo Spawn.
Big "Shut Up!": Werelight belts out one when she becomes swamped with people berating her for not telling her friends about Werelight combined with the fact she was getting her flank handed to her by the Windigo Spawn.
Call Back: Werelight tells Spike his "secret" in order to gain his trust early in the plot.
Demonic Possession: Windigoes have been going left and right to possess other ponies. Ponies under possession become filled with hatred or turned into monsters. It's also apparently the source of the Werelight form, although Twilight's willpower and/or her status as an Element Bearer keeps her in control.
Later it's revealed that the Windigo Spawn aren't limiting themselves to just ponies...
Genius Bruiser: Twilight in Werelight Shine form, as she retains her intelligence while becoming extremely strong.
Go Through Me: Spitfire does this in order to protect a group of pegasi from Trixie. This doesn't work, however, as Trixie gladly obliges to get rid of her before the pegasi. Had Twilight not intervened in the nick of time, Spitfire could've met an untimely demise.
Moral Myopia: Twilight uses the events of Lesson Zero and A Canterlot Wedding as evidence that she can't trust her friends with her secret, conveniently ignoring how irrational and unreasonable she was in both episodes.
Mouth Cam: Happens when Werelight feels the urge to eat the CMC.
Multiform Balance: Twilight can only use the full extent of her magic when in her normal form, Werelight's magic being reduced to telekinesis. In exchange, Werelight has far more physical strength and power, as well as ice powers.
The Multiverse: The blog has made references to other universes with their own Werelight (normally ones that have died in some way). While these are other blogs, Werelight's appearances in them are mainly cameos.
Nice Job Fixing It, Villain: Trixie forced a Windigo Spawn into Twilight Sparkle. However, Element Bearers are immune to the Windigo's Demonic Possession, resulting in Twilight gaining her powerful Werelight form to help her fight the Windigos.
Nightmare Sequence: Twilight has one after passing out in Cloudsdale. She dreams that she and her friends were having a nice picnic until Trixie comes in and turns her into Werelight, causing her to attack her friends. Which leads to...
She returns the favor to the Windigo possessing him once she gets it out of him.
Not Using the Z Word: In a sense, Twilight never refers her new form as a "werepony." Justified as it is just a Windigo spirit in her body, not an actual were-curse.
However, other ponies, more specifically, ponies that live outside Werelight's Tumblrverse, in fact do call her a werepony. However, this may be due to their unfamiliarity with how her world works and not because Werelight is actually one to begin with.