Outside of creating great original music under pseudonyms like Lemon Demon, he has also been responsible for things like "Potter Puppet Pals", "The Song of the Count", and three magnificent mashup albums among seemingly countless other creative projects.
In short - The man is brilliant. I support his Patreon page, and I would encourage you to do the same.
"The Ultimate Showdown of Ultimate Destiny" was my introduction to the genius of Neil Cicierega, and it remains one of my favorites in his catalog to this day. I was all too happy to attempt to tackle this song when my friend and Patreon patron David Youd requested it. Still, to say it was a challenge is an understatement. I insisted on attempting to sing the lead vocal at the same time as playing the bass part, which lead to over 100 takes over the course of two nights for the bass/lead vocal alone! I finally nailed it (close enough) when I decided to livestream the recording on Facebook for added pressure.
I hope you enjoy it.