Oath of Kaya [War of the Spark]

Set: War of the Spark Type: Legendary Enchantment Rare Cost: {1}{W}{B} When Oath of Kaya enters the battlefield, it deals 3 damage to any target and you gain 3 life. Whenever an opponent attacks a planeswalker you control with one or more creatures, Oath of Kaya deals 2 damage to that player and you gain 2 life. "So everyone gets what they truly deserve, I will keep watch."