I had an idea for 2 cards called Red Shift and Blue shift. No idea about the artwork but essentally the cards generate a

for every
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(Red shift) or a
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for every

(Blue Shift). They are permanents. this may be a bit overpowered so i think maybe one
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or
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for 2

but i don't know. essentally the idea is to make light easier to use as a multi-color becase it isn't very good on its own (at least not pvp). The card cost is ~5 and upgrading it makes it immaterial.