The Shores of Tuern is a skirmish, which can be queued for in the queue menu. For the normal version, required Gear Score is 10,500 while for the epic, it’s 13,000. You can find rare items such as the Haarl’s Treatise on Dragonkind, which unlocks the fourth boon in the Tyranny of Dragons campaign. In the epic version, you even have a chance to receive Artifact Belts, but only if you can defeat Garakas.