U
Enchantment
All creatures are Plains lands in addition to their other types

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Land
1W, Discard a card, T, sacrifice ~this~: each player may search his or her library for up to four land cards and put them into the battlefield. Each player who searched his or her library this way shuffles it.
T: add 1 to your mana pool
4: ~this~ is a enchantment in addition to its other types until end of turn

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3RRR
Sorcery
attach target Equipment to target multicoloured creature. Gain control of that Equipment until end of turn
Splice onto Arcane: X the colour of your choice mana, where X is the number of creatures on the battlefield, Sacrifice a tapped library

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AlexChurchill/MagicCardGenerator