This was created as a New Year's card in 2021. I drew this inspired by the popular comic "Kimetsu no Yaiba", which was made into a movie and became a big hit.
I've been working at university since this year, and it's a joke that sees the availability of teacher discounts on Adobe products as a new battle skill. However, at this time, I was still using the Adobe Creative Cloud I bought myself, and I was not getting the benefits of the discount :-p.