Stronghold

The Stronghold is a very rare landmark that appears on beaches of uninhabited islands. It's a stonebuilt building emerging from the ocean, with a door in its circle-shaped wall. Inside the stronghold, there is a strange Rune Stone which can be interacted with if the player possesses the required items.

Draegan Invocation
If the player has a tiger fang, a Bounty Hunter's amulet and a moonrock ring in his inventory and interact with the Rune Stone, it will disappear into the ground and the fight with Draegan will begin. An iron gate will block the exit and will disappears only if the player kills Draegan or he's killed. Draegan will spawn in the center of the stronghold in his Banished Form. Three pillars of power will spawn around the fortress, along with three dark portals next to them. As soon as the fight begins, three priests of Draegan will go out of these portals and attacks you.

Default seed coordinates

 * 26E / 21N
 * 53E / 59S
 * 23W / 99N
 * 71W / 33S

Trivia

 * Lenvell can tell you the location of a rune when the quest "Summoning Draegan" has started.