Klaus fed Ray his blood before killing him, beginning his transition from a werewolf to a hybrid. ... With this hypothesis, Klaus turned Tyler Lockwood into a hybrid and with the help of Elena's blood, Tyler survived the transition and became the first successful hybrid.

How does Klaus make hybrids without Elena?

Klaus was the first ever hybrid. To create them, he would have needed to kill a werewolf with his blood in their system, and then have them drink his blood again to transition into a vampire. The doppelgänger was used to bind Klaus.

How did Klaus become a hybrid?

Klaus is known as the Original Hybrid. He is a werewolf-vampire hybrid being werewolf by birth because Mikael is not his biological father. Klaus was conceived through Esther's infidelity with a werewolf chief over a time where her marriage with Mikael was struggling.