Aether Revolt — Rare
Ajani's Aid rulings:
2/9/2017 : The last ability of Ajani’s Aid doesn’t target anything. You choose a source of damage as the ability resolves.
2/9/2017 : You can activate the last ability even if there is no creature about to deal combat damage, or even no creature at all. No damage will be prevented, but it will enable your revolt abilities.