User blog comment:Miskos3/Fairy Tail Chapter 472: Laxus vs. Wahl, Review/@comment-24102956-20160210232211/@comment-7418318-20160210232616

All the spriggans have massive magic power. Maybe some of the more sensitive members sensed him even over that distance and concluded that a presence that's felt so strongly over such a distance can only be a third spriggan.