Nyaal's Senses are a game mechanic in Atlas Fallen. Nyaal has the ability to sense Shards for the Gauntlet's improvement. This ability is integral part of the quest Reforging the Gauntlet, after the Gauntlet turned out to be instable and needs repair.
For the players, this is displayed on-screen as light beacons that determine the direction of the gauntlet shards.