(labeled as Real Realworldcrossover for some reason)

again, going for something easy today.

2^nd apocalypse, Buffy goes off to protect everyone (having already agreed to a plan the next day)

Giles should have known the instant Buffy agreed without a protest, when she was so against the idea. He ran, though he knew he’d be late. Which made him run harder.

Dawn came back (using her Key powers, but Glory’s apocalypse remained firmly in place) and was angry and terrified when her sister died. She latched onto Xan and Spike as father figures. But then Spike died, and Xan wore his ashes in a necklace. It’s pretty much Vibora Bay Crisis when the second apocalypse came ‘round.

They use Dawn’s portal powers to call in help, because there’s no way they’re surviving a third on their own. Even with two of the most powerful witches, a half Draconian, a Key, and an Archmage. (Also a lesser wizard and a gadgeteer. And a Slayer-Faith).