This is from the FGO Anniversary CE. I may get around to uploading the rest of them, but I uploaded Mephistopheles first because holy hell is this a change from his standard art.

Blue_Stuff said:

This is from the FGO Anniversary CE. I may get around to uploading the rest of them, but I uploaded Mephistopheles first because holy hell is this a change from his standard art.

I didn't even believe this was him at first.

Well it is kinda fitting for him to make a drastic change of appearance given the original Mephistopheles who first appeared to Faust as a poodle.