Magic is the manipulation of elemental forces that permeate the world. It is trained rather than innate, and anyone with sufficient aptitude and instruction can learn it. The applications of magic range from the profoundly mundane to the catastrophically powerful, and in the absence of a parallel technological tradition, magic has become the substrate of civilization itself: the forge, the road, the courier, the physician.
Magic is ubiquitous in Avendar as a preternatural aspect of the plane's laws and is a necessary aspect of both the ecosystem and the function of nearly every society. Like every natural force and law, it was woven into the structure of the plane by Iandir upon its creation. During the Sundering, magic was divided into six spheres each tied to a unique resonance, preventing mortals from ever wielding more than two types at once. Magic is sometimes confused with psionics, which is a related but entirely distinct faculty.
Overview
Origins
The alatharya, the first people of Avendar, practiced magic in its original unified form. After the Sundering, the magic that survived was fragmented into discrete spheres. Artifacts made before the Sundering still function, but the constraints on casting and creation imposed by the Sundering have never been lifted. No spell can involve more than two spheres, and access to certain spheres is conditioned on the resonance of the practitioner's soul.
The Six Spheres
The six spheres are earth, air, fire, water, spirit, and void. Each was discovered, codified, and propagated separately over millennia, by different peoples in different circumstances; some through scholarly patience, others in the crucible of war. The sphere framework accurately describes how magical practice works in nearly every case a practitioner will encounter. It is the foundation of formal magical education across most of the world and is treated by most scholars as simply true.
Natural Magic
Not all magic fits neatly into the sphere framework. Natural magic as practiced most visibly by druids and rangers outside formal sphere taxonomy, drawing on elemental forces through attunement and intuition rather than codified discipline. It is a trained practice, not an innate gift, and it is genuinely effective, though the actual mechanics of what they are doing is poorly understood. Formal institutions and sphere-trained scholars have a long tradition of dismissing it as glorified hedge magic, a characterization that says more about institutional bias than about natural magic's actual capabilities.
Deific Intervention
The spheres are not indifferent to those who wield them. The gods of Avendar hold varying degrees of dominion over the spheres, most pronounced with fire and water. An Overgod with dominion over a sphere can revoke a practitioner's access to it entirely -- and has, on documented occasions. On the scale of most lives, divine intervention in magical practice is vanishingly rare, and tends to concentrate among practitioners who have made themselves sufficiently notable to attract it.
Practice
Learning
Magic is a trained discipline. There is no lineage that produces spontaneous, untrained casters, and no reliable shortcut past the foundational work of study and practice. How magical training is structured varies considerably by place and culture. In the human city-states of Earendam, Var Bandor, Gaald, and Harrud, formal training follows a guild apprenticeship model, with established scholarly guilds taking on students and advancing them through structured progression. Templars and other martial practitioners who incorporate magic into their work typically pursue this same path. Elsewhere, the structures look quite different: colleges and universities in Daphoa, religious and monastic institutions throughout the caladaran world and the srryn, hereditary lineages, master-student pairs, and regional traditions with their own internal logic. What these share is that magical training is always organized, and though informal self-study is possible, it is punishing, and most practitioners reach a ceiling without a teacher to push them past it.
Pace of learning depends heavily on what kind of magic is being learned. A scholar focused on battle applications can reach genuine competence within a year of dedicated effort, as combat magic is, somewhat ironically, the most straightforward branch of the discipline. Industrial, artificing, and advanced scholarly work are measured in years. A scholar who has been practicing for a decade is not unusual; one who has been practicing for three is formidable.
In practical terms, a working scholar occupies roughly the social and economic position of a skilled artisan or tradesman. The training investment is comparable, and so is the professional infrastructure around it.
Resonance
Every soul carries a resonance: an intrinsic quality that reflects its relationship to the poles of existence. Resonance has direct practical consequences for what magic a practitioner can access. Earth and air magic are ungated, and any practitioner can learn them regardless of resonance. Fire and void are inaccessible to strongly gold-aligned practitioners; Water and spirit are inaccessible to strongly red-aligned practitioners. Void is also empowered by deep red alignment, and spirit by deep gold. In practice, this means the shuddeni and ch'taren are excluded from these resonance-locked spheres. Certain advanced workings in void and spirit are also unavailable to practitioners who lack sufficient alignment to their corresponding pole, even where access itself is not completely blocked.
Casting
Most magic requires nothing but willpower and knowledge. In practice, nearly all formal casting involves speaking arcane, the language of magic: an artificial tongue constructed from pre-Sundering alatharyan runewords and loanwords drawn from languages across the world. Words and phrases in arcane are chanted during casting, and the language is used by practitioners everywhere, regardless of lineage or sphere. It is not inherently magical; neither the words nor the gestures do anything on their own. They exist to focus and direct the will of the caster, giving intention a precise form it can be channeled through.
Alongside verbal components, most workings involve somatic elements: specific gestures, postures, and physical motions that work in concert with chanting to channel the spell precisely. The demands of both scale with power, where a minor working might require only a few words and a deliberate movement of the hand and a major working may demand sustained chanting, complex choreography, and a caster fully committed to the act. Air scholars are a notable exception to the verbal component, as they are capable of subvocalizing, casting in complete silence with their chanting internalized. A spell cast without verbal or somatic components is not impossible, but it is much harder, requiring more willpower, more expenditure, and less precision as the caster's will must compensate for the lost structure.
The caladaran, who were among the first to formalize magical theory, developed the unit of measurement still used across most of the world today: mana, which describes the energy expenditure required to produce an effect. The term is universal enough that most practitioners even outside of magical practice use the term to refer to personal energy expenditure without knowing or caring about its origin.
Arcanima
Arcanima is the practice of embedding magic into objects, creating effects that persist without an active caster sustaining them. It is its own specialization distinct from scholarly practice, and one that often carries significant component requirements alongside the expertise needed to work it. Materials, reagents, and prepared focuses can make arcanima an expensive undertaking even before accounting for the practitioner's time.
The durability of arcanima varies enormously. Most constructs require ongoing maintenance and periodic attention from a trained practitioner to keep the working stable. In cities with robust guild infrastructure, this upkeep is part of the service economy, a normal ongoing expense for anyone relying on magical installations. In less developed areas, the same infrastructure either doesn't exist or has to be improvised. At the far end of the spectrum are permanent magical devices: extraordinarily rare, requiring resources and knowledge that few can assemble, correspondingly powerful, and almost without exception involving artifacts that are pre-Sundering in origin.
The sophistication of arcanima visible in a given place is a reliable indicator of how dense and organized its magical institutions are. A frontier settlement might have a hedge-trained practitioner who can charge a simple object, while a major city will have specialists capable of maintaining complex, layered works that have been running for generations.