"While spells from the school of wild magic often had a certain element of chaos within them, they still had definite mechanics and purpose. However, for any spell a wild mage cast, there was the danger that they lost control over the raw power they utilized and released it in what was called a "wild surge": the freed magical energy either influenced and distorted the intended spell, or produced a totally unpredictable additional effect."
-Unknown
Bard Spells (College of Lore)
When one speaks of magic in Eberron, one is also speaking of weather, or philosophy, or life itself. Magic is as varied, changing and as little understood as all these, and it suffuses everything. It is part of the fabric of existence, dancing in the Ring of Siberys and echoing in the vaults of Khyber.
But the word 'magic' hides myriad categories of thaumaturgical workings, from essentially pedestrian alchemical marvels to the true miracles of artifice, elemental binding, and the magic of dragons. Beyond even that, the term 'magic' can cover the corruptive influence of the Daelkyr and their aberrational progeny, psionic power of the Quori, and even more esoteric arts.
In sum, Eberron's magic is a vast field encompassing far more than can easily be identified in a single tome. It is a world in itself, filled with islands of thought and use that can be identified, clarified, and described in greater depth.