Betting On A Battlemaster

 is the second quest given by the Sea Hunter and thus the second quest in the Sea Hunter's Guild quest line.

Walkthrough
To start this quest, talk to the Sea Hunter and choose Betting On A Battlemaster. He will say the following:

Upon starting the quest, the Battlemaster's Lucky Coin will have a chance to spawn on any Pirate Battlemaster encountered on Battlemaster Settlements. It has a high drop rate so kill a few of them until it drops, then returns to any Sea Hunter to finish the quest, by choosing the same dialogue option. He will say the following once you finish the quest:

Rewards

 * Access to the Sea Hunter's Guild's second stock of items:
 * Trader's Ring
 * Exquisite Poison Potion
 * Pain Reduction Tonic
 * Access to the next quest in the Sea Hunter's Guild quest line, In Search Of A Spider.