1UU
Instant
copy target activated ability and you may choose new targets for the copy

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3BBBBB
Creature - Human Cleric (1/2)
B: target creature with echo can't block (This effect doesn't end) and that creature can't block (This effect doesn't end)
2B: ~this~ deals 3 damage to each of two target creatures
--His haircut walls off even the wisest throat and collapses the plot
– Thim, Shaman of the Isle

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3RRR
Enchantment - Aura
Enchant legendary nonblack enchantment
Enchanted enchantment gains ''Whenever a creature is dealt damage, target creature with power X or less, where X is the number of unblocked creatures on the battlefield gets +3/+0 until end of turn''
Discard a card: target Samurai gains ''Whenever you cast a land spell, target opponent may pay 4. If that player does, destroy target artifact you control'' until end of turn

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AlexChurchill/MagicCardGenerator