What discourages me are more long-term concerns, mostly about keeping together a deck that is so linear with too much at stake
Try making your commander massive with Elven Ambush and finishing the game with Haldir, Lrien Lieutenant
However, technically speaking, that's not the end of the story
If you print a 72 DPI image on a physical card, it will look blurry, pixelated, and "cheap." To achieve the crisp, sharp text found on authentic MTG cards, you must design your file at 300 DPI (High Resolution) or higher
What custom Magic cards usually means (so you dont overcomplicate it) Most people making custom Magic: The Gathering cards fall into one of these buckets: Alt-art re-skins: Same card text, different art and vibe (your Sol Ring is now a cursed waffle iron, as it should be)
Get off my yard