Thank you for taking an interest, to make it casual modern I would take out the fyndhorn elves for iron myr so you can have a mana dork that produces red, and replacing the sprouting vines with maybe armillary sphere to get extra lands to your hand. You may want 4 of the sphere and either tinker with the various mana dorks or even take out 1 or 2 lands cause of the abundance.
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