The Talons of Vengeance
Uncommon26.0%ObjectiveOptionalGlitched
Aided the Crows in sending a message to any who claim Antiva from its people.
Complete 2 side quests for the Antivan Crows faction - these can be found by reading letters around the Lighthouse. The first will be available after Lucanis joins your team (which happens as you progress the story).
Some reports this is glitchy - if it doesn't unlock then either reload a save, or grind the faction to max rep and it'll unlock then.