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Independent Validation: A Public 36-Deck Reference Set Beyond the tournament calibration, we validate the calculator against a public, fully reproducible reference set of 36 decks spanning every bracket: WotC-published precons (Brackets 12), curated Upgraded and Optimized lists (Brackets 34), and well-known cEDH lists (Bracket 5)

I have been lucky enough to dodge the Elsha deck until more recently, but I can say that it is a powerful and consistent deck if the deck builder intends for it to be

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It would be quite strong even if you never lined up the color of mana you made with the colors you actually need