Which line from William Butler Yeats’s “The Second Coming” most plainly contains apocalyptic imagery?

“The best lack all conviction, while the worst/Are full of passionate intensity.”
“A shape with lion body and the head of a man,/A gaze blank and pitiless…”
“Surely some revelation is at hand;/Surely the Second Coming is at hand.”
“…while all about it/Reel shadows of the indignant desert birds.”

“…while all about it/Reel shadows of the indignant desert birds.”