Raven Masquerade:

After several major earthquakes, a rift in the Veil between the human world, and the world of the creatures of myth was formed. This rift has become more stable, allowing it to remain open entirely. The creatures of the Veil are known as Veilkin in general. The rift is still new enough for Veilkin to need a host to help them survive outside the Veil. This is called a Master/Slave bond. The bond w...