A black orb has appeared in the Glittering Grotto, and an eerie howl can be heard coming from within. Go and investigate!
This bounty is available to complete after beginning Errand 131.
This is a rehash of the Cerboreas fight, so travel to The Glittering Grotto, then make your way to the very end of the area where you fought the boss before. Check out the black orb here to fight the Cerborealis!
This is the first of the re-fights that you'll probably either have trouble with or will have to keep on your toes the entire fight. He doesn't have a weak spot to fire that Cerboreas had, and he's too quick to stand idly by to cast spells at the whole time, so you'll need to go the route of physical attacks. Your best bet would be to use tank-type familiars that have very high Defense stats, that way you can go toe-to-toe with the Cerborealis without having to heal your HP every ten seconds. While doing that, go ahead and buff your party up to increase the damage output.
Not much can be done about his attacks; he's very quick and will hurt you in a heartbeat, so be sure to stay healed. Hopefully your direct assault will be able to cancel them before they're unleashed.
Defeat it and you'll complete the bounty hunt, return to the Swift Solutions to claim your reward.