I do not own Doctor Who or Once Upon a Time. Only this story. Enjoy!

Chapter 1: Witches

(*FLASHBACK*)

Enchanted Forest

The Wicked Witch strolled through the halls of the Evil Queen's empty castle once again. Zelena moved into the castle after Regina's curse brought everyone to a land without magic. She decided to make the castle her new home and wait for her sister's inevitable return. She initially wanted to bring a whole army of flying monkeys with her, but she ran into some trouble with the Doctor and Martha Jones back in Oz and was only able to take a few monkeys. The witch walked into Regina's bedroom and looked at the empty kingdom. Her green skin stood out as she wore another one of Regina's dresses. Suddenly, she heard a voice calling from behind her.

"I hate her too." A female voice said.

Zelena turned around and saw a tall woman with brown hair and a long purple coat.

"Who are you?" Zelena asked.

"Missy." She replied. "I hate your sister too."

"How do you know Regina?" Zelena asked. "How do you know she's my sister?"

"I was friends with your mother." Missy said. "Cora told me all about both of you."

"So what are you then?" Zelena asked. "Some kind of witch?"

"Something like that." Missy said.

"Why do you hate Regina?" Zelena asked.

"She's been a constant disruption in my plans." Missy said. "She and the Doctor."

"You know the Doctor?" Zelena said.

"More than you know." Missy said. "I came here because I need your help to destroy the Evil Queen. Your mother was fun, evil, and powerful. Seeing as she's now dead, you're not a bad second choice. Plus you have a bloodlust for revenge against her."

"What do you need my help with?" Zelena asked.

"I need your help procuring a weapon from a far away land." Missy said.

"What will this weapon do?" Zelena asked.

"Destroy your sister." Missy said. "Do we have a deal?"

"We certainly do." Zelena said with a villainous smirk.

(*PRESENT DAY*)

Storybrooke

Missy stood at the town line. It was night in Storybrooke. The area around the tine line was deserted, as it normally was. Missy kept checking her watch. She was waiting for her accomplices to arrive. She hoped they wouldn't be too much longer. She really wanted to get started. Suddenly, there were two flashes of light in front of her that teleported two Sontaran soldiers with laser guns.

"Well it's about time you two got here." Missy said. "I paid a handsome bargain to acquire your services. I assumed you'd be on time."

"You have selected our services to assassinate someone." The first Sontaran said.

"I picked the best warriors in the galaxy." Missy said. "And I don't want you to kill one person. I want you to kill two people."

"Who?" The second Sontaran asked.

"The Dark Ones." Missy said. "Emma Swan and Killian Jones."

Missy then handed them two small devices that looked like iPhones.

"What are these?" The first Sontaran asked.

"These are special trackers." Missy said. "They will allow you to locate centers of extreme dark magic. They will lead you to the Dark Ones."

"What will you do?" The second Sontaran asked.

"I need to find my old friend Zelena." Missy said. "We have a lot to catch up on. Now run along and kill the Dark Ones before the Doctor gets here with whatever chippy girl he's with nowadays."