Buffy has a powerful new weapon, but the gang cannot find any information about the origins of the mysterious scythe. Eventually the Slayer goes herself in search of knowledge, and finds a new ally, an old friend, and great danger (Source: TV.com).
Starting moments after the the previous episode ended, "End of Days" begins as Buffy (Sarah Michelle Gellar) effortlessly pulls the scythe from the stone. The First tells Caleb (Nathan Fillion) to let Buffy go, so that she could attempt to save more