4RBB
Artifact
When ~this~ leaves the battlefield, target opponent may pay 1. If that player doesn't, two target creatures with power X or more, where X is the number of cards in an opponent's hand gain ''All untapped lands are 1/1 creatures in addition to their other types'' until end of turn

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4BUU
Artifact
When ~this~ leaves the battlefield, up to three target artifacts gain ''Whenever you are dealt damage, attach target Equipment to target blue creature. Gain control of that Equipment until end of turn'' until end of turn
--The wisest boundary may imprint
– Yetta the Learned

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4R
Creature - Giant Rogue (3/2)
All untapped attacking creatures can't block
When ~this~ is returned to its owner's hand, copy target colourless sorcery spell and you may choose new targets for the copy

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AlexChurchill/MagicCardGenerator