4WG
Artifact Creature - Myr (1/1)
At the beginning of each player's precombat main phase, put a leak counter on ~this~. If ~this~ has X or more leak counters on it, where X is the number of green spells cast this turn, flip it.
When ~this~ leaves the battlefield, clash with an opponent. If you win, two target nonblue enchantments gain protection from Myr until end of turn
3U: any number of target permanents you control gain ''When ~this~ is returned to its owner's hand, you may Pay 1 life. If you do, two target untapped artifact creatures get +2/+2 until end of turn'' (This effect doesn't end)
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Legendary Artifact Creature - Myr (4/3)
At the beginning of each opponent's upkeep, each player gains 1 life for each creature on the battlefield

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3B
Enchantment - Aura
Enchant creature
Enchanted creature can't be blocked except by creatures with both power and toughness X or less, where X is the amount of mana in your mana pool

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U
Instant - Arcane
Choose one: return target permanent to its owner's hand; or target attacking facedown creature can't be blocked except by nonlegendary creatures until end of turn

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AlexChurchill/MagicCardGenerator