Michael Corvin: I want to stay with you.
Lucian: You're acting like a pack of rabid dogs. And that, gentlemen, simply will not do. Not if you expect to defeat the vampires on their own ground. Not if you expect to survive at all.
Selene: Whether you like it or not, you're in the middle of a war that has been raging for the better part of a thousand years. A blood feud between vampires and lycans. Werewolves.
Michael Corvin: Huh?
Selene: Consider yourself lucky. Most humans die within an hour after being bitten by a lycan or any immortal. The viruses we transmit are deadly.
Michael Corvin: So... if you bit me, what happens? I become a vampire instead?
Selene: No, you die.
Selene: How can you trust him over me?
Viktor: Because he's not the one who has been tainted by an animal.
Selene: It wasn't the Lycans. It was you. How could you bear my trust knowing that you killed my family?
Viktor: Yes, I have taken from you but I have given so much more. Is it not a fair trade for life I have granted you? The gift of immortality?
Selene: And the life of your daughter? Your own flesh and blood?
Viktor: I loved my daughter. But the abomination growing in her womb was a betrayal of me and the coven. I did what was necessary to protect the species. As I am forced to do yet again.
Viktor: Your incompetence is becoming most... taxing.
Michael Corvin: They'll kill you too for helping me.
Selene: I know.
Lucian: We were slaves once. The daylight guardians of the vampires. I was born into servitude. Yet I harbored them no ill will. Even took a vampire for my bride. It was forbidden, our union. Viktor feared a blending of the species. Feared it so much he killed her. His own daughter. Burnt alive for loving me. This is his war. Viktor's. And he spent the last 600 years exterminating my species.
Chosen answer: In most of the shots, Lucien takes his coat off when he changes to wolf form, and the blade would be attatched to a mechanism in him coat. Also, the film gives us an example of the blade hurting a vampire: bloodloss. And that kind of weapon could do some serious damage, and as it probably wouldn't kill the vampires, it would almost definitely slow them down.