Over on Facebook, I run a monthly challenge group with over 19000 followers. Every month, I supply a theme and photo-references and invite artists from around the world to draw from the references to create art. The challenge has been going for years - I participated back in 2013-2014 when it was run by its founder, artist Alberto Ruiz. And now that I run it, I still participate. Here are some of my entries:
Harley Quinn, in her ensemble from Birds of Prey.
Sarabet, a contemporary witch.
Jinx, from the game League of Legends
Bayonetta
A succubus playing a game like Magic the Gathering.
Spider-Gwen.
BabyDoll, from Sucker Punch.
Aelyth, an elf, playing an elvish version of Dungeons & Dragons.