Any of you guys ever made any custom MtG cards? I have. I've made three whole blocks, in fact. Two that take place on an original plane of mine (Avustrad), and one that ports Warhammer 40k into MtG.

Here's some example cards from Avustrad.

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what site/program are you useing?

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I use the magic set editor. It's a really well-made program.