Lost Ark experience really kicks in once you get your first ship. In addition to the main quest now crossing the sea to Tortoyk, you also can access to a vast ocean of islands. All islands have their own story to tell. Serenity Island is probably one of the first islands you visit.

Obtaining the Island Soul for Tranquility revolves around a quest chain involving a legendary blacksmith. It's connected to the main storyline, so the game leads you here no matter what. You will need to revisit both dungeons to collect some items to complete the third part, the Stone of Power - Heart of Totoic (Forest of Giants, Totoic) and Ruins of Morai (Saran Hill, Yudia).

After completing tasks in these dungeons, you will return to the Legendary Blacksmith, someone will then ask you to defeat Metomus, the mob leader on the Isle of Tranquility. He has 70,000 health and is level 50, but is slow so shouldn't prove too much. Defeating him will see you rewarded with island souls such as Lost Ark Gold.

The task of Tranquility Island is relatively simple and does not require a lot of effort, but the subsequent tasks will become more and more difficult, and you need to upgrade equipment and skills to complete the task. At this time, you need to spend a lot of Lost Ark Gold, and you can't get a lot of Lost in a short time. The way to get Ark Gold is to go to the IGGM website to Buy Lost Ark Gold. In fact, this is also a shortcut.

If you want to konw more detalied guides, here recommand a website  IGGM.com, in which you can get more information about Lost Ark.