Buffy, the Vampire Slayer: End of Days

Buffy finds herself able to wield a powerful scythe, and rejoins the gang following the explosion that left Faith injured and many Potentials dead. Xander leaves Sunnydale with Dawn in accordance with Buffy's wishes, while Buffy tracks down the origins of the scythe, which culminates with her battling Caleb once more and, with Angel's help, taking him down.