Equipped for All Occasions

Walkthrough
1) Head to the ??? at (H-10) of the first map of Arrapago Reef (the same ??? used in Luck of the Draw) as Corsair, level 40 or higher.

2) Examine the ??? for a cutscene, during which you will be presented with three choices: Maze of Shakhrami, Gusgen Mines, or Ordelle's Caves. Choose the Maze of Shakhrami (the only correct choice).

3) Head to (K-9) of the second map of the Maze of Shakhrami and examine the Iron Door to spawn the NM, Lost Soul. (Note: You don't need to be Corsair to spawn the NM.)
 * This NM is a Skeleton with around 3,500 Hit Points
 * When he is in critical condition (around 10% HP), he will begin using Blood Saber rapidly.
 * He can be defeated by some jobs at level 75, namely NIN, RDM, BLU, and WHM.
 * Also soloable by a NIN/THF at 61, with decent evasion equipment and Blade: Jin (it's recommended that you bring a few Hi-Potions as well).
 * Easily soloable by a PLD/NIN at 74+.
 * Very easily soloable by a BST75 (CourierCarrie hits for 300).
 * Also soloable by a 75 SMN. Garuda's Predator Claws was shown to hit for 2069.
 * He can also be defeated very easily by a level 70 dragoon using a healing wyvern and a blunt weapon.
 * Also soloable by a 75 DRK/NIN.

4) After defeating the Lost Soul, examine the Iron Door again for another cutscene, in which you will be given the key item, Wheel Lock Trigger.

5) Return to the ??? in Arrapago Reef for another cutscene. (Note: You don't need to be Corsair to get this cutscene.)

6) Head to Shararat Teahouse in Aht Urhgan Whitegate and speak with Ratihb for your reward.
 * If you had not previously received the final cutscene from Ratihb after finishing Luck of the Draw, you will need to complete that cutscene first, then check Ratihb again to obtain the Trump Gun.

Game Description
Client:
 * ??? - Arrapago Reef (H-10), CS NPC Qultada

Summary:
 * In order to become an official Seagull Phratrie crew member, you need a proper weapon. According to the crew, you may be able to find one in an old cave...