These four collaborations are the most unique I've been a part of. It's called a "Choose Your Artist" collab, where a group of artist would collectively made a cosplay art of their chosen character according to the theme agreed on beforehand, and then made a "choose your character" video game-styled video out of everyone's cosplay art

The tarot card collaborations are also popular among artists, where we draw characters as a tarot card. I love this collaboration because it trained me to interpret tarot card's symbolisms and translated it into another illustration focused on the characters