From Final Fantasy XIV A Realm Reborn Wiki
Aetherpact is an action unlocked by questing at level 70. It's available for Scholar.“
Orders faerie to execute Fey Union with target party member. Effect ends upon reuse.
- Faerie Gauge Cost: 10
- The Faerie Gauge increases when a faerie or Seraph is summoned and an Aetherflow action is successfully executed while in combat.
— In-game description