Rules are the same as the thread from 2016.
For those too lazy to click the link, I'll just quote it here:
Pretty simple. You post an Xyz Monster's name, and the next person creates a CXyz or Number C version of it. They can be in the actual game, or something you made up, but in the case of the latter, link to it and make all our lives easier.
And to start us off,
Diamond Dire Wolf