Traits

Allows for heart-shaped horns.
Can be applied through the use of x1 Heart-Shaped Box of Chocolates.
Art by LegendaryPotatoes

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Allows for flower-shaped horns.
Can be applied through the use of x1 Lilitoile Bouquet.
Art by LegendaryPotatoes

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Allows for orb-shaped horns.
Can be applied through the use of x1 Glass Marbles.
Art by LegendaryPotatoes

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Allows for drop-shaped horns that lie flat against the head. Not to be confused with Nub [C] Horns, which protrude outward.
Can be applied through the use of x1 Raindrop Cake Set.
Art by LegendaryPotatoes

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Allows for star-shaped horns.
Can be applied through the use of x1 Konpeito.
Art by LegendaryPotatoes

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Allows for the inclusion of visual glitches, non-Euclidian geometry, or an abstracted appearance. (Read more here.)
Can be applied through the use of x1 Phantasmagoria.
Art by NYAHILISM

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The first reference image features the Traits: Elf [C], Nub [C], Long [C], and Distortion [L].
The second reference image features the Traits: Point [C], Curl [C], No Horns [UC], Long [C], and Distortion [L].
The third reference image features the Traits: Point [C], No Horns [UC], Long [C], and Distortion [L].

ONLY OBTAINABLE DURING THE FESTIVAL OF FOOLS.
Allows for one set of hominoid hands/feet OR for the hallux (back toe) of an otherwise standard anisodactyl Starlyng to be positioned like a thumb.
Digits CANNOT be applied to all four hands and feet to give them hominoid features. 
Digits CAN be applied to all halluces.
Can be applied through the use of x1 Bigfoot's Hoot Plaster Cast..
Art by universe