RR
Instant
~this~ deals 4 damage to target creature. When a creature damaged this way is put into a graveyard from the battlefield this turn, return it to the battlefield under your control

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BR
Creature - Zombie Snake (3/1)
Sacrifice a blue creature: put a 4/4 black Zombie creature token onto the battlefield
Sacrifice a Zombie: up to three target tapped legendary libraries gain ''Sacrifice a library: target attacking creature with power 4 gets -2/-2 until end of turn'' until end of turn
4WUBRG, T: Regenerate ~this~

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3
Creature - Vampire (1/3)
Flying
Whenever ~this~ is dealt damage, target player may Pay 3 life. If that player does, all permanents you control gain protection from white until end of turn

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AlexChurchill/MagicCardGenerator