|“||The old Lockwood cellar, where you spitefully slaughtered 12 of your own hybrids, is here.||”|
The Sacrifice of Twelve Hybrids is an event planned and orchestrated by Atticus Shane and Hayley Marshall-Kenner as a part of the Expression Triangle. It's purpose is to use the energy of the twelve souls to allow Bonnie Bennett to access a kind of Dark Magic called Expression (the worst magic), to perform the spell required to open the tomb of the first Immortal man ever; Silas.
Atticus Shane uses Hayley Marshall to round up 12 unsired hybrids for sacrifice, including Kimberley and Adrian; this would eventually help Bonnie Bennett access magic without the help of the Spirits. Hayley pretended she was helping Tyler Lockwood to release twelve hybrids, and to defeat Klaus once and for all. Her true intentions, however, are to discover what happened to her family. Atticus manipulates Hayley by leveraging this fact, claiming to have information.
- Of the twelve hybrids, the first one, and the last one of the killed hybrids had names (Adrian and Kimberley, respectively).
- If the strength of the twelve hybrids is sum, it is the double Niklaus' strength, causing it to be a potential threat to him, or the Originals. (Each hybrid is equal to the strength of a vampire of 170 years).
- Tyler and Damon have shown the same force during their confrontation in Homecoming.
- It was the second of the three massacres, after the sacrifice of the humans and before the sacrifice of the witches.