3
Creature - Zombie Soldier (1/2)
Sacrifice a untapped creature, T: each opponent loses 4 life and you gain that much life
All untapped attacking creatures gain first strike

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4B
Creature - Human Wizard (1/1)
Discard a card, Sacrifice ~this~: destroy two target nonblack creatures
If a Wizard would deal damage to a creature, that damage is dealt to target creature instead
T: target opponent loses 5 life
WUBRG, T: ~this~ deals 3 damage to each creature

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3B
Enchantment
3BUBR: put a 1/1 white Cleric creature token onto the battlefield
Sacrifice a Cleric: target player reveals cards from the top of his or her library until that player reveals a card, puts that card into hand, and exiles the rest.
Discard a card: put a 1/1 colourless Spirit creature token with flying onto the battlefield
Sacrifice ~this~: put a 1/1 white Cleric creature token onto the battlefield
Discard a card, Sacrifice a basic land, sacrifice a Cleric: each player may search his or her library for a card, reveal it, and put it into its owner's graveyard. If those players does, those players shuffles that library afterwards.

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AlexChurchill/MagicCardGenerator