They said that black flower represent power, mystery, elegance, farewell and goodbye. Lovely isn't it? I found out Asriel is perfect on Black Dahlia flower. Which is actually a burgundy color tied to a warning of betrayal.

Feel free to read: http://blog.interflora.co.uk/top-10-black-flowers/
http://www.flowermeaning.com/dahlia-flower-meaning/

Undertale by Toby Fox
Fanart by meh