Source: Songbird, Scion, Saboteur, pg(s). 80
Scion's Dagger is an elegant dagger decorated with a large black sapphire, forged by Grand Prince Penticus IV to protect his eldest son Penticus V, who was promised to strange outsiders so his father could take the Taldan crown. Penticus V later used this dagger to commit suicide, denying his father's patrons and letting his brother Tralian V take the throne.
The owner of Scion's Dagger can designate up to four willing creatures as bodyguards who can sense the owner's status while the blade is held in the wielder's hands. If the owner dies while wielding Scion's Dagger, their soul is transferred into the black sapphire (if it is not currently occupied by another soul), and can be resurrected or released to the afterlife by anyone holding the dagger.