It is suppose be a cover art of some sort.Related to LDB in a way, as suppose to be a combine au thing for a LDB + Undertoggle.What is Undertoggle? Well, you read it all about it here on the official au blog: undertoggle.tumblr.com/whatsun… I do recommend checking the AU and OST for it, PiuGraveMusic does amazing job when comes to the music.Also, Unharmonized Return Of King K.Rool!Check out the concept wip of 'Unharmonized Return Of King K.Rool!'here: ldb + undertoggle -unharmonized return of King K.Rool. , based on Bombustion Stroke Back by PiuGraveMusic: