I thought that "My and Nightmare's fusion looks so damn simple". I could upgrade it to this

Crown, violet, pin and the cape like on shoulder comes from Nightmare with along they eye colours!
Light blue, the wing like on the pin are from Min!

The dark goop comes still from the corrupted Nightmare and the ears and hair like goop is from Min.

If you like this design then the other one, I can change it to this ^^