The Vortex is a giant whirlpool in the middle of the Roiling Seas, the center of which is supposedly the point where Aeneus Avica opened the portal to the Lower Realms. A hurricane known as The Wrath of Avica whirls at abnormally high speeds above the Vortex, its eye never moving, merely hovering over the exact center of the whirlpool.
On especially clear days when the Seas are particularly calm, a mountain can be seen in eye of the hurricane that seems to rise up to the sky. It is known as Aeternum’s Hubris, and no one has set foot on it since the Fracture. Theoretically, if one were to attempt to reach the mountain, their ship would have to survive the edges of the Wrath of Avica, only to be met by the Vortex itself, which is massively powerful and pulls everything unfortunate enough to get caught in its current in towards Aeternum’s Hubris. Then, they would have to manoeuvre through the Vortex and somehow find a safe place at the base of the mountain to dock without being smashed to pieces on the rocks.