Very nice! This took me about 30 minutes to re-implement for Magic: The Gathering cards (with data from mtgjson.com), and then about 40 minutes or so to create the embeddings. It does rather well at finding similar cards for when you want more than a 4-of, or of course for Commander. That's quite useful for weirder effects where one doesn't have the common options memorized!
I was thinking about redoing this with Magic cards too (I have quite a lot of code for that preprocessing that data already) so it's good to know it works there too! :)
