Dweoric's Inimitable Inscription

You inscribe a personal mark on a surface you touch. The mark consists of a signature or identifying sigil, which is unique and innately linked to you, and can be placed on any solid surface or object. The mark must be at least 1 inch in its smallest dimension, and no more than 1 foot in its largest dimension. The mark does no damage to the surface on which it is inscribed. The mark cannot be placed on a living creature.

When you cast this spell, you may choose one of two forms for your mark:

Visible. The mark is visible, in any colour you wish, and optionally emits a faint glow.

Hidden. The mark is invisible under normal conditions. Creatures under the effects of see invisibility or true seeing can see the mark, as can any creature with truesight or who can see through illusions.

In either form, a creature who casts identify on the item bearing the mark or focuses on the item while under the effects of detect magic immediately becomes aware of the mark, and the identity of the individual whose mark it is.

A creature who is touching your personal mark counts as being "familiar" with you for the purposes of sending and scrying. If they cast either of those spells while touching your mark and you are aware that the spell is being cast, you are aware that they are using your mark to do so. If you have inscribed multiple marks, you do not learn which of your marks is being used.