Rescue
The shear power of the sword had kept Buffy drooling for a good five minutes until someone had finally nudged her in the back and brought her back to life. She thought the Scythe was awesome, Buffy was in love with the sword from the moment she touched it. It was just so...pretty, shiny, and powerful. If this didn't kill Glory, she didn't know what would. It was their best shot, she had to believe it would work, because she was getting everyone back.
So with her Scythe with Vi, and Lucifer's sword held tightly in her hand, they'd headed off as soon as the witches had Glory's location. Why they were able to locate her this time, she didn't know. Frankly, Buffy didn't care. It just meant that she was going to die.
On top of that, Spike was there. That had to be. Something that use to be hers, but not anymore? While Spike was missing? He deserved to be rescued, she knew he wouldn't give Dawn up, and that was why they couldn't leave him there. Buffy didn't bother telling anyone what this 'thing' was, because if brought them to Glory, then who cared?
A tiny part of her was afraid, but as she kicked down the door to Glory's apartment, she ignored it. The bitch had to die. Sword raised, she entered the first room.