An Undying Pledge
From FFXI Wiki
- Speak to Stray Cloud for a cutscene.
- Head towards Sea Serpent Grotto, you will get another cutscene shortly before you reach the zoneline.
- Once inside Sea Serpent Grotto, head to (K-6) where you will find a ???.
- Check the ??? to spawn Glyryvilu.
- Defeat Glyryvilu, then check the ??? again to receive the Key Item Caliginous Blade.
- Return to Stray Cloud for your reward.