
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.
When this creature enters, other creatures you control get +2/+2 and gain vigilancevigilanceAttacking doesn't cause this creature to tap. and trampletrampleExcess combat damage it deals to a blocker carries over to the player or planeswalker it's attacking. 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.