Land
T: add G to your mana pool

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U
Creature - Human Rogue (2/2)
At the beginning of your upkeep, ~this~ gains ''When ~this~ leaves the battlefield, all creatures get -4/-0 until end of turn'' until end of turn
activated abilities that aren't mana abilities cost all players an additional ''Pay 4 life'' to cast
Whenever ~this~ is dealt damage, any number of target creatures with echo get -3/-0 until end of turn

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U
Enchantment
WU, Sacrifice a Wizard: target creature with power 6 or more gains ''When ~this~ is returned to its owner's hand, put a leak counter on target artifact'' and ''Each permanent with a leak counter on it is a Forest land in addition to its other types'' until end of turn

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AlexChurchill/MagicCardGenerator