
FlyingFlyingCan only be blocked by creatures with flying or reach., hastehasteCan attack and use tap abilities the turn it comes under your control.
Whenever Excava attacks, return up to one target artifact, creature, or non-Aura enchantment card with mana valuemana valueThe total amount of mana in a card's cost, ignoring colour. A card costing has mana value 4. X counts as 0 except on the stack. 3 or less from your graveyard to the battlefield with a finality counter on it. It's a 1/1 Spirit creature with flyingflyingIf a creature with a finality counter on it would die, exile it instead. in addition to its other types. (If a creature with a finality counter on it would die, 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.