Pepsi_Al 
Ponifiying the casts of TTGL, Fire Emblem Jugdral, Fire Emblem Elibe, and Fire Emblem Tellius.
Trying to make a custom MLP doll based off of a ponified Anti-Spiral Nia, using Celestia/Nightmare Moon/Gold Lily/Sterling as the base.
A redesign for Nyx's (from Past Sins) Nightmare form. (No clear image came to mind as of yet, though.)
A Nightmare Rarity wallpaper based off of one of those "eyecatch" transition-to-commercial sequences from Tengen Toppa Gurren Lagann. (Specifically, one of those that you see in episode 18.)
A scene interpretation of the moment from "Princess Twilight Sparkle" where Luna becomes Nightmare Moon, with Luna looking more noticeably scared than in the show itself.
A humanized Nightmare Rarity cosplaying as Anti-Spiral Nia.
An AMV that syncs scenes from the post-timeskip events of Tengen Toppa Gurren Lagann to"[Endless Mist of Nightmares":](https://www.youtube.com/watch?v=vVEYPnbTaBI). (But with the "EP" version of that song used instead.)
An interpretation of the scene from Past Sins where Nyx and Rarity first meet, with a flashback of sorts to the Nightmare Rarity arc from the IDW comics.
A picture of Nyx from Past Sins, as "Nightmare Nyx," looking in a shattered mirror whilst in rage and sadness at the same time. With images of Nightmare Moon and Nightmare Rarity laughing at her from the mirror shards.
A picture of an older-looking Nyx from Past Sins (Probably based off of SilverArrow's interpretation.) together with"[Sparity from Vavacung's 'Crazy Future.'":](https://derpibooru.org/721408
)
Some pictures that play around with the "name's the same" trope with characters from MLP:FiM and FE14.
Nyx from Past Sins cosplaying as Corrin from Fire Emblem: Fates. With Nightmare Nyx as the "DaNohrkian BlNoodble," and the proper older version of Nyx as the "WHoshitedan BlNoodble."
That's basically all I can think of besides some Fire Emblem x Valkyria Chronicles fanart, as well as Nia Teppelin cosplaying as The Spy from TF2.
Trying to make a custom MLP doll based off of a ponified Anti-Spiral Nia, using Celestia/Nightmare Moon/Gold Lily/Sterling as the base.
A redesign for Nyx's (from Past Sins) Nightmare form. (No clear image came to mind as of yet, though.)
A Nightmare Rarity wallpaper based off of one of those "eyecatch" transition-to-commercial sequences from Tengen Toppa Gurren Lagann. (Specifically, one of those that you see in episode 18.)
A scene interpretation of the moment from "Princess Twilight Sparkle" where Luna becomes Nightmare Moon, with Luna looking more noticeably scared than in the show itself.
A humanized Nightmare Rarity cosplaying as Anti-Spiral Nia.
An AMV that syncs scenes from the post-timeskip events of Tengen Toppa Gurren Lagann to
An interpretation of the scene from Past Sins where Nyx and Rarity first meet, with a flashback of sorts to the Nightmare Rarity arc from the IDW comics.
A picture of Nyx from Past Sins, as "Nightmare Nyx," looking in a shattered mirror whilst in rage and sadness at the same time. With images of Nightmare Moon and Nightmare Rarity laughing at her from the mirror shards.
A picture of an older-looking Nyx from Past Sins (Probably based off of SilverArrow's interpretation.) together with
Some pictures that play around with the "name's the same" trope with characters from MLP:FiM and FE14.
Nyx from Past Sins cosplaying as Corrin from Fire Emblem: Fates. With Nightmare Nyx as the "
That's basically all I can think of besides some Fire Emblem x Valkyria Chronicles fanart, as well as Nia Teppelin cosplaying as The Spy from TF2.