S05E22 - The Gift
DAWN: Buffy, it’s started.
The energy ball grows — and shoots out a lightning-like tentacle of energy. It hits an intersection of the street — and the street crumbles away into a fiery abyss.
Again, a bolt — And a nearby building is transformed into an alien looking structure.
Close on the structure, and we see unearthly zombie creatures start to crawl out of the holes in it. They are white-faced and horrible, like the decaying corpses of things that were never human.
IN THE SKY, a rift opens and a huge dragon flies out, screaming as it sails past the girls