Fated to the Demon Queen
Literally and figuratively.
Not many things can heal a wound to a vampire's heart. Despite it being fucking useless just sitting there in our chests, not pumping blood, it's still a fatal shot to hit it. That, along with ripping our heads clean from our bodies or burning us, are the only ways to kill us. Stab us in the kidneys or liver, and we heal within the hour, but the heart or the head? Done deal.
And her mark healed a wound to my heart; a dagger plunged directly into the center of my useless heart. I met death; I felt its ice-cold caress over my body, and it didn't feel much different from her power flooding into me from her mark.