The Lightwardens

“

The Crystal Exarch welcomes you back to the Crystarium.

— In-game description

Rewards

Speak with the Exarch.
Speak with the Exarch at the crossroads beyond the Accensor Gate.
Speak with the Exarch at the Northern Staging Point.
※ Use the Duty Finder or Trust to enter Holminster Switch.
Speak with the Exarch.
※ Completion of this Quest will unlock the Trust System for regular use.

Having listened intently to your experiences with the Leveilleur twins, the Exarch reveals the existence of powerful beings known as Lightwardens, whose destruction he believes is necessary to save the First and avert the Eighth Umbral Calamity. Soon after, your discussion is interrupted by a breathless Captain Lyna, who reports that a nearby town - Holminster Switch - has come under attack by a swarm of sin eaters. The Exarch quickly issues commands, and requests that you assist in the settlement's defense.
After you agree to lend your aid, the Exarch urges you to make swift preperations, and meet him at the crossroads north of the Accensor Gate.
You rendezvous with the Exarch outside the Crystarium, and he gives you directions to the Northern Staging Point. Time is of the essence.
You arrive at the woods on the outskirts of town, where Captain Lyna briefs you on the situation. Considering the number of sin earters involved, it seems likely that a Light Warden leads the attack. Make preparations to enter Holminster Switch and slay the abomination.