Extract the key!
Written by RyanWithZombies
Update: The key is not "flag{ don't trust the Cheshire cat!! he works for the Queen of Hearts }". Sorry about that. It's an artifact from an easier version of this challenge. You need to extract key.jpg.
HINT:
CSAWLZ is a completely custom format! You won't find decompressing tools on the internet. We made it just for you. :)