Arcane Magic

The substance of arcane magic in Oath-Bound is nwyf — an underlying property of the world, present everywhere, in everything. It is not a finite resource that practitioners draw from a shared pool. It does not deplete. A room does not run out of nwyf because a mage has been working in it.

What is finite is the caster. Marshalling nwyf, shaping it, directing it toward a specific effect — this is strenuous work. It demands concentration, precision, and a quality of sustained mental effort that most people cannot perform at all and that trained practitioners can only sustain for so long. The nwyf does not tire. The caster does.

This means the limiting factor in arcane magic is the practitioner’s capacity to continue working, not the availability of the substance they work with. A mage who has cast heavily is not out of spells in the way a vanilla magic-user is out of memorized slots. They are depleted — cognitively and physically — in the way that any person is depleted by sustained strenuous effort. Rest restores that capacity. Nothing else does it as effectively.

The spell list will be immediately recognizable to any AD&D 1e player. Fireball, magic missile, charm person, invisibility, sleep — these are present, they work as expected, and the broad shape of what each spell does is unchanged. Spells are organized into bands of ascending power rather than strict spell levels, but the correspondence is close enough that a player familiar with the vanilla list will have no difficulty orienting.

The adjustments that have been made are minor and mostly reflect the removal of alignment from the setting. Spells that in vanilla AD&D are explicitly aligned — protection from evil, detect evil, and their counterparts — are reframed in terms that fit the Oath-Bound cosmology rather than moral polarity. The mechanical effect is broadly preserved; the conceptual framing is different.

A player coming from vanilla AD&D should shift one mental model: instead of tracking which spells remain in the memorized set, track how the character is doing. A mage who has cast several times in quick succession is not running low on spells — they are running low on themselves. The decision of whether to cast again is the same kind of decision any character makes about pushing through fatigue: possible, with diminishing returns, and not without cost.

The spells themselves remain a known quantity. The management of the caster is what changes.