I describe magic in many ways in my game, both in visual terms ( as in "the aura you assense is dark red with violent orange and black tinted gashes running through it" ), or feeling ( "there's a distinct cold and and emotionally detached sense to this background count" ), or smell ( "the dagger smells sour and somewhat like old rust" ), or auditory ( "it's almost like a thousand screams linger on the astral winds" ), or even taste ( "When you open your astral senses you immediatedly taste blood in your mouth as if you had bit your own toungue hard" ), but most often a combination of one or more of them. This goes for all magical effects spells, spirits, items, auras, people ( unless they are masked of course )...etc.
Magic is very important in my game so i mostly make quite a bit of effort when describing it.
