Special type of compass, which points to nearest Biome Islands.
At the moment, the compass can be found only in Dungeon Tower loot, but in future there will be a way of creating the compass.
The needle always points to the closest Biome Island, as long as one exists and the player is in the End. Right-clicking will scroll through all existing biomes.
Holding the compass shows all biomes of selected type as markers on the screen. The markers are small rectangles with the color of the selected biome, the rectangles also get bigger the closer you are to the island (they also disappear if you reach the island, and reappear when you leave it).