I picked pack 1 elementals, pack 2 vivid, now I have an unplayable mess with 4 plains and no white spells that struggles to cast anything because of the heavy color requirements with such bad mana. It has 1 dual land, and that's it. 4 "colorless" plains in a 17 land deck. Please let us change the manabase of jump in decks or at least be mindful of this when building your halfdecks. Or just don't offer multicolored packs if the mana is not going to work.

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