
FlyingFlyingCan only be blocked by creatures with flying or reach., vigilancevigilanceAttacking doesn't cause this creature to tap., trampletrampleExcess combat damage it deals to a blocker carries over to the player or planeswalker it's attacking., hastehasteCan attack and use tap abilities the turn it comes under your control.
Whenever Power Pack deals combat damage to a player, exile target instant or sorcery card from your graveyard chosen at random. At the beginning of your next upkeep, you may cast that card without paying its mana cost. If that spell would be put into your graveyard, exile it instead.
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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.