Awaken is a keyword ability.
- 702.112a Awaken appears on some instants and sorceries. It represents two abilities: a static ability that functions while the spell with awaken is on the stack and a spell ability. “Awaken N—[cost]” means “You may pay [cost] rather than pay this spell’s mana cost as you cast this spell” and “If this spell’s awaken cost was paid, put N +1/+1 counters on target land you control. That land becomes a 0/0 Elemental creature with haste. It’s still a land.” Paying a spell’s awaken cost follows the rules for paying alternative costs in rules 601.2b and 601.2f–h.
- 702.112b The controller of a spell with awaken chooses the target of the awaken spell ability only if that player chose to pay the spell’s awaken cost. Otherwise the spell is cast as if it didn’t have that target.