"The barrier between our world and..." Glamerspear shook her head. "...some other one, full of nasty creatures absolutely jacked up on mana. That's how Ignacio and the Eclipse work -- they're conjurers, bringing those demons into our realm and binding them to stuff. Like Eb's suit of illusion armor, or some medallions another Eclipse, Aldonza, gave us to disguise ourselves as batponies on the Moon."