Land
~this~ enters the battlefield tapped.
T: add U to your mana pool
All permanents are red
When ~this~ is returned to its owner's hand, you may pay 1. If you don't, two target creatures with both power and toughness 4 or more get +1/+1 until end of turn
G: add 3 to your mana pool for each creature with power X or more, where X is the number of permanents an opponent controls on the battlefield

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3
Enchantment
Whenever an opponent gains life, destroy all black creatures. They can't be regenerated.
3WW: each player may search his or her library for up to one land card and put it into hand. Each player who searched his or her library this way shuffles it. and attach target Equipment to target green creature. (Control of that Equipment doesn't change.) and that creature is white (This effect doesn't end) and ~this~ is white until end of turn

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3WWW
Enchantment - Aura
Enchant creature
Whenever enchanted creature deals combat damage to a creature, ~this~ gains protection from instant or sorcery spells until end of turn
protection from red
protection from creatures
4WW, Tap an untapped white creature you control: ~this~ deals 6 damage to target attacking or blocking creature

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AlexChurchill/MagicCardGenerator