Rupert Giles broke open the door to the costume shop called Ethan's after Willow walked through it and came back a few minutes later and reported an unresponsive man about his own age on the floor in the back of the shop. Which was almost enough to confirm his suspicions as to who was responsible. Stepping into the back room and seeing Ethan Rayne lying on the floor confirmed it.
Spotting the two faced bust on the table he murmured. "Janus, god of duality. Among other things." He crouched by Ethan and shook him. "Ethan, you ponce, tell me what you did here!" He ordered as Willow hovered anxiously nearby.
Ethan stirred and cracked open his eyes. "Ripper...it was just a lark..." He gasped softly. "Went wrong."
"What went wrong? What did you do?!" Giles demanded.
"Fun game...done it before, never went bad." Ethan gasped again. "Burned me out, took more than it ever did before."
"Where did you get the power?"
"Janus, should have just been Janus. But it required more power and he wouldn't give it. Had to draw power from a second source." Ethan struggled to breathe as everything hurt.
"Where did the extra power come from?" Giles relentlessly questioned.
"Hellmouth."
"You drew power from the Hellmouth?! Are you mad?! You may have weakened it enough to open it!"
"Destroy the bust, spell will end." Ethan sighed as he accepted that this time he'd really messed up. "I'm burned out, old man." Referring to the complete loss of his ability to cast Magic, as though he'd been cauterized.
"Serves you right!" Giles muttered. "Children are in danger and at least one might be dead because of you! The loss of your ability to cast Magic is small payment for your crimes." He glared at the man and stood up, grabbed the bust and angrily threw it at the wall. A wave of power dispersed from it, intersecting with the wave of power from the spell Dr. Stephan Strange had just cast. Transformed humans were human once more, confused humans, but humans.
Except Willow, who to her horror, realized she was still a ghost and broke down crying as an enraged Rupert Giles viciously kicked the fallen man before gently guiding the sobbing young ghost out of the shop. All the while praying Buffy and Xander were alright.
Back in the Library the spell drew power from the Hellmouth instead of Dr. Strange and hit first Angel, who twisted in pain as he fell to the floor of the Library, before beginning to spread. First through Sunnydale and than through the world itself and just as the spell was designed to do, it destroyed every vampire it encountered. Faster than thought it raced around the world. Thousands, tens of thousands of vampires crumbled into dust as the spell found them wherever they nested, abandoned houses, caves, it didn't matter. That spell had one purpose and one purpose only, to destroy vampires and it did.
Every last one. Well, with one exception.
Princess Buffy was Buffy Summers again as Ethan's spell ended and her eyes widened in horror as she saw her boyfriend twisting in pain on the floor and remembered Xander's costume had cast a spell to kill Angel after sensing he was a vampire.
"No, no, no!" She half collapsed beside Angel and held him as his body twisted and turned in pain. "What did you do, Xander?!"
"It wasn't me, Buffy." He answered. "It was Dr. Strange and he was trying to protect Princess Buffy. He cast the spell from the book, the complete spell."
"What does that mean?!" She tried to hold Angel as the pain intensified and he cried out.
"Half the spell would have destroyed a single vampire, the complete spell destroys all vampires. All of them, Buffy. All over the world and the spell didn't draw from his own power reserves, it drew from the Hellmouth. The Hellmouth is fueling that spell, giving it the power it needs to wipe out the vampires."
Buffy didn't think to question how he knew any of that as she was too busy being scared for her boyfriend as the pain seemed to be lessening and than stopping. Angel lay there gasping and Buffy was so relieved that he seemed to be alright that she just hugged him tight.
"Buffy! You're hurting me!" Angel choked out and Buffy eased up as Xander walked up the steps to the mezzanine level and crouched beside Angel.
"Huh, looks like your curse changed the spell a little, Deadboy." Xander smirked. "For you anyway, it worked as intended for all the other vampires out there."
"What do you mean, Xander?" Buffy asked, staring at her friend.
"He's not a vampire anymore, Buffy. He's human. Guess I can't call you Deadboy anymore, huh? Unless Mrs. Summers gets her hands on a shotgun, I mean." Xander laughed.
"What? What are you talking about?" Buffy glared at the laughing teen.
"I thought it was disgusting you wanted to get with a vampire. How do you think your Mom's going to react if human Angel comes to pick you up for a date? He's now a human a decade older than you. Your mother would have him arrested, if she doesn't just shoot him." Xander laughed again as he stood back up and moved to the stairs, sobering as he remembered something else. "Willow was a ghost! Damn it, the transformation spell may have had after affects of it's own. I have to find Willow!" He raced out of the Library, intent on finding his oldest friend, even as he knew, the transformation spell had left after affects, for him, as he effortlessly cast a locator spell and followed it to her body, still lying on the porch.
As he stood next to her lifeless body, he realized the transformation spell had left another after affect and picked her body up and levitated away.
