Angel: After the Fall (2007) #4
Plotted by Joss Whedon and Brian Lynch. Script by Lynch. Art by Franco Urru. Come closer and I'll tell you Angel's biggest secret. Listening? Okay, here's the thing: he's no longer a vampire. That's right. As a cruel, little joke, the top executives at Wolfram & Hart took away his supernatural strength, healing ability and his only hope of surviving in the demon-infested Hell that has become Los Angeles. However, with some sorcery and occult knowledge, and aided by Wesley's ghost, Angel is able to keep healing himself on an as-needed basis.
And boy, is he ever going to need it. After the assassination of a High Demonlord's son, Angel is staring straight in the face of all-out slaughter of what's left of L.A.'s innocents unless he can find out who's behind the killing. To buy time, our hero has issued a challenge to each and every Demonlord in the greater Southern California region. But without any vampiric might, he's going to need help. That's where his old buddies Lorne and the Groosalugg come in! Meanwhile, Gunn and his gang of vampires make their move on Wolfram & Hart and Spike and Illyria are warned to stay out of the coming war!