
FlyingFlyingCan only be blocked by creatures with flying or reach., lifelinklifelinkDamage dealt by this also causes you to gain that much life., hexproof fromhexproof fromThis creature can't be the target of monocolored spells or abilities your opponents control. planeswalkers
BoastBoastActivate only if this creature attacked this turn and only once each turn. — , Sacrifice a creature: Each opponent sacrifices a creature or planeswalker. (Activate only if this creature attacked this turn and only once each 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.