This spell allows you to inscribe your personal rune or mark, which can consist of no more than six characters. The writing can be visible or invisible. An _arcane mark_ spell enables you to etch the rune upon any substance without harm to the material upon which it is placed. If an invisible mark is made, a [_detect magic_](/spells/detect-magic) spell causes it to glow and be visible, though not necessarily understandable. [_See invisibility_](/spells/see-invisibility), [_true seeing_](/spells/true-seeing), a _gem of seeing_, or a _robe of eyes_ likewise allows the user to see an invisible _arcane mark_. A [_read magic_](/spells/read-magic) spell reveals the words, if any. The mark cannot be dispelled, but it can be removed by the caster or by an [_erase_](/spells/erase) spell. If an _arcane mark_ is placed on a living being, the effect gradually fades in about a month. _Arcane mark_ must be cast on an object prior to casting [_instant summons_](/spells/instant-summons) on the same object (see that spell description for details).