I give a gift of myself to thee.
Take it freely; freely it is offered, and forever thou hast me in thy keeping.
I swear love unto you and pledge you my troth.
May those who watch over love watch over this oath and those who keep it, and may we never find fault in their eyes.

This oath needs no explanation. It is spoken in unison by the two (or more) lovers it binds, and it takes a Trait of temporary Glamour from each to craft a chimerical songbird visible only to the lovers. The instant the oath is broken, the bird ceases to sing, perching silently on the shoulder of the oathbreaker, and becomes visible to all as the sign of betrayal. In addition, both betrayer and betrayed gain a permanent Banality Trait as a result of this cowardly action. On the other hand, an Epiphany resulting from Rapture the lovers share bestow an additional Glamour Trait. The songbird cannot be affected by any known means of tampering.