Start the mission here
[7,-59]Take the quest from the Great Jarl Ordyn in [7,-59].
Take the quest from the Great Jarl Ordyn in [7,-59].
Talk to him Great Jarl Ordyn. He will send you with him Jarl's Mariner, which can take you to the island of Belladonna.

At the dungeon entrance, talk to Ayin Spyr. Then complete the Dungeon from Belladonna.

Defeat Belladonna at the end of the dungeon. After the fight, talk to the NPCs that appear in the room to validate the progress.
Belladonna
Come back to him Great Jarl Ordyn to announce victory. Then enter the tavern on the left and talk to Ayin Spyr to close the mission.