Vileblood Oath

Target creature gains Vileblood. If it already has Vileblood, it also gains: "Whenever a creature dies, you gain 1 life and each opponent loses 1 life." and +1/+0 until end of turn.

{1}{r}{r}, Sacrifice a creature and this enchantment: Draw a card, if a Vileblood was sacrified by this ability, return it to the battlefield at the beginning of the next upkeep.