I love using challenges to explore some aspect of the world I hadn't really thought about. It can really help you break out of the mold and focus something that might be way outside your wheelhouse. Embrace it - you'll find something there that you like.
Challenges are a great way to get new people to check out your work. Remember that they don't know all the things you do: look for a way to show new readers with what your world is all about!
“Under Lunestra’s glow, Dahlia’s petals trembled as the dark wolf approached, bringing the promise of a guardian and a miracle.”