The warning fails
Mind link, as Eldrian classified it, was difficult to explain in words, though the knowledge of mageia helped the explanation greatly. Up until now, he had relied simply on feel to communicate with the Alicorns, first having naturally relied on them forming the connection to get the feel.
As he learned more about it and tested, the more sense it made that it was absent to static mages. Unlike standard magic, the reliance was little on mana and mostly on willpower and state of mind.
It required the use of mageia as Eldrian would say, and if the distance wasn't great, little to no mana entered the equation. But this heavy reliance on the non-mana aspect of magic made it elusive to the static mages who placed near all their focus on mana and spell constructions.