Sim, as mágicas são visíveis para qualquer pessoa que possa ver
Em "Perceiving Magic" na pág. 280:
Magic is rarely subtle. Any form of magic (conjuring, spellcasting, enchanting, magical lodges, spirits, etc.) changes the world around it. Sometimes it’s obvious through a magician’s gestures or incantations (magicians seen by non-Awakened people are sometimes called “twitchy fingers”). Spirits sometimes cause the air to shimmer, even from astral space. People have reported feeling chills, dread, or other unnatural sensations they can’t quite put their finger on when magic is in the area.
E logo depois na próxima página:
Obviously, if a magician is throwing fire from his fingertips, you’re probably going to notice without making a test. But if the magic is subtle, then you have to pick up some dice.
Aquela bola de fogo que você está jogando não é furtiva ... é uma bola em chamas que libera calor e luz, e qualquer fragger vai notar o seu mojo se tomar essa forma.