Spell

A spell is an invocation or incantation (usually, but not always, Latin based) that makes use of the natural and magical force of the Narnian Cosmos to contrive effects one ordinarily is unable to perform, such as levitating an object, creating fire, or stunning another creature. Spells are most effective when used verbally, although they can be carried out without the use of speech.

When recited, spells send out a jet of high-speed usually in the form of light (some are visible, others are not). The energy of the spell may be gauged by the color of the jet - for example, a green-colored spell would be more powerful than a red-colored spell, as it's wavelength is longer.