user is the main boss of a dark world, dess and asriel wish to seal the dark fountain. Your goal is to stop this (or not, whatever you want, bromunculus)

I was listening to..

Mercy - Terraria Homeward Journey OST, theme of the "World's End Everlasting Falling Whale" (yes that's the boss's full name, its a giant fuckass whale death god)

while making this one

art by @orionporion on Tumblr

Sorry for the low quality opening message. I will rework it when I get access to a computer, I've been working on this on my phone.