Sean: Yea, who gave you the right to play god with her life?
Nick: Hey, this all about survival of the fittest! You don't learn that and you are going to die... or worse.
The Forsaken (2001)
Ending / spoiler
Directed by: J.S. Cardone
Starring: Johnathon Schaech, Brendan Fehr, Kerr Smith, Izabella Miko
Sean and Nick kill Kit. Sean rams a car against Kit and the incoming dawn roasts him. Nick tells Sean that Kit wasn't the vampire who bit him so he has to keep searching and kill the one in order to cure himself of the bite. Sean joins Nick in his hunt for that vampire and they travel on with their "crusade" against vampires...
Darkseid
