Buffy the Vampire Slayer. Season 9. Volume 4. Welcome to the team
"Rededicated to the Slayer mission, Buffy is reducing the zombie population one by one--until she is ripped from a battle and transported to Los Angeles. The demon Illyria and a mystical council make the Slayer an unwilling recruit in a team formed to take down an increasingly powerful enemy--the Siphon. Having regained his strength after a showdown with Buffy, he's back in action, gathering power and endangering whatever remnants of magic linger...