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 spell causes it to glow and be visible, though not necessarily understandable.
See invisibility, true seeing, a
gem of seeing, or a
robe of eyes likewise allows the user to see an invisible
arcane mark. A
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 spell.
If an
arcane mark is placed on a living being, normal wear gradually causes the
effect to fade in about a month.