My current side project is decorating deck boxes for some Magic the Gathering decks that I frequently use. I discovered that cardboard is the perfect canvas for watercolors- it doesn’t warp when soaked, and I don’t need to stretch it!!
This is one of the three that I’m currently rly working on. It’s for a deck built around the card of Tishana, Voice of Thunder. Official art for the card is here: 
