Celtic wizards are mnemonic. They, rather than using special components, used carved runes as components. However, these carved runes must be carved during a specific natural event. The rarer the normal components, and the higher the spell’s level, the rarer the natural event must be. First level spells, for example, might have to be carved during a specific lunar phase, or from a twig bathed in the sun’s dying light. Fourth level runes might have to be carved during one of the equinoxes. A ninth level spell’s runes might have to be carved while a comet is in the daytime sky.
