The last of the Nightmaren Trio, here's Jackle the Mantle. Yes, his/her body is intentionally invisible, so that's why you only see clothing.
I may not have the right colors, but these were the closest I could get to using Jackle's appearance in a special "Sonic Lost World" DLC. As for him/her being able to use magic without a horn, Jackle is a psychopathic being of nightmare who wields razor-sharp cards as a weapon, and if he/she wants to use magic without having a horn, I'm not going to to tell him/her that he/she can't.
Shouts outs to for the Luna vector used as a reference and to for the nebula texture used in Jackle's cape. The reason I used Luna instead of Celestia is because Jackle is Level Two Nightmaren, unlike NiGHTS and Reala, who are both Level One Nightmarens.