
MenaceMenaceCan't be blocked except by two or more creatures., lifelinklifelinkDamage dealt by this also causes you to gain that much life.
If a nontoken creature an opponent controls would diedieA creature dies when it goes from the battlefield to a graveyard. Being exiled or returned to hand is not dying., exile it instead. When you do, you may pay . If you do, create a 1/1 black and green Pest creature token with "When this token diesdiesA creature dies when it goes from the battlefield to a graveyard. Being exiled or returned to hand is not dying., you gain 1 life."
Whenever you gain life, you may pay . If you do, put a +1/+1 counter on each creature you control and those creatures gain trample until end of turn.
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Read from the rules text. A card that enables a keyword makes or is the thing; a card that rewards it gets better when you have it. Two cards interact when one enables what the other rewards.