Collect an Island Soul. It is the prize you Lost Ark Gold receive by completing an island. Sometimes, this can mean raising Rapport with an local NPC and other times, you need to complete one of the quest lines or do the PvP challenge.

Island Souls (also called Island Tokens) are the most important reward you can earn for completing an island-based challenge. It is possible to learn more about the nature of these challenges by talking to Opher, who's located in The Lonely Island northwest of Pleccia (right left side of map). After opening the dialogue window, find the area (such as 'chest' adventure quest' or 'Rapport') by hovering over the list with Island Souls.Opher is also the NPC to reach out to if your goal is to exchange your Island Souls for rewards. Sacrifice these Island Souls to the statue on the shore first (a few miles to the east) and then contact Opher to acquire some of the items listed below:

Adventure Islands are a typical endgame game. To find one, open Procyon's Compass and then click the 'appearance notification information' button. You'll find out when and where the next Adventure Islands will appear. You'll also be able to view the recommended level of items and the expected rewards.

Sailing to the Adventure Island and wait for access. You can't see the island in the moment, but that you're on the right track when you see a massive maelstrom that is surrounded by other boats congregating. Once your Adventure Island appears buy Gold Lost Ark, right-click to enter. The co-op adventure begins immediately. Be sure to complete the quest, and don't be afraid to ask for assistance via chat if the mission isn't clear.