So is this like an actual fusion of NMM and the Tantabus, or is more of a symbiote relationship. In which the form we see is more of a mode in which Nightmare is allowing the Tantabus more influence and control over their form.
 
A very cool concept indeed, and one that I could see being a true possibly that could play out. Overall a really neat thing to see. Good job
 
Also I can’t tell is she is embarrassed or sad mainly cuz her muzzle has got me thinking she is in a mix of being sad as due to the ethereal tears yet seems confused as to why she is crying…