incantus

Incantus is a term used in fantasy literature, role-playing games, and some mythic traditions to denote a spoken or chanted magical formula that triggers a supernatural effect. An incantus typically consists of a sequence of syllables or words, delivered with a specific cadence, often accompanied by gestures, rune objects, or ritual timing.

In-world etymology commonly traces the word to roots akin to the Latin incantare, meaning to enchant, though different settings may treat incantus as a specialized noun for the chant itself rather than the effect.

In many fictional systems, the effectiveness of an incantus depends on correct pronunciation, intonation, and the caster's intent or focus. Some traditions require training to master the vocal component, while others emphasize memorization of a fixed text or a rhymed couplet.

The power of an incantus may vary by length, complexity, or the presence of ritual components such as circles, talismans, or spoken permissions from a magical authority. Variants of incantus can range from simple, utilitarian spells to elaborate ceremonial invocations used for sealing wards or summoning beings. In role-playing games, incantus is sometimes treated as a distinct category of spell with its own mechanics, linking verbal and, in some cases, material components.

See also incantation, spell, magic system.