in the Source URL, where they have the name of the cards they were based on in each image description (because I suck at coming up with original cards, so they are all parodies of the Magician Girl archetype and its related cards).
I know 20 cards is very Duel Links-ish and some people are not very cool with that, but slap some duplicates in there and you're all set. Some may be limited/semi-limited, but I'll let you make that decision on your own.