Sacred Haven of Debauchery

Hmm, in Battlegrounds, I came across an island (I was sent there on a mission) where mages get stuck when trying to teleport (I don't know exactly how or where, but probably they were crossing its meridian during teleportation). Perhaps their magical energy attracted mages to the island, like a magnet. There, their magic weakened, and they were trapped.
In short, the point is that I immediately remembered Lost, because there is a similarity.