When this spell is cast, the caster thinks of one thing, whether it be dragons, a goblin named zokk, the language common, or even a certain god, and anything that fits that category  is immediately removed from existence. E.G: if the caster thinks of cats, all cats would cease to exist, including lions & tigers. If the thing the caster chooses doesn't exist, everything is destroyed, including the gods. If the caster is not specific, the spell goes haywire, E.G: if the caster chose 'enemies' then anything that is anything's enemy will cease to exist.