Nether compass and the nether core

The nether compass would be an item made of 4 obsidian, 4 gold and a compass, or it could be traded from the cartographer when at a certain level, the compass would activate when entering the nether and it would point to the nearest nether core, the nether core is a block that could be located at the center of a nether fortress, this way players can have a easier way of finding a fortress when exploring the nether to progress.