Disclaimer: I don't own Percy Jackson and the Olympians or Merlin. This is my first fanfiction so please let me know if you have any ideas for the story. The pairings are as they are in the canon storylines. Enjoy!

1. Thanks for the present, mom.

Annabeth

Annabeth was furious. After everything they had done for them, the Gods wanted more. Of course, there was nothing that she could do about it. So she just stormed out of the Big House. She went to find Percy and tell him that she'd have to leave for a while.

Annabeth had been having a nice time with Malcolm that morning - discussing plans for building some of the minor gods' cabins. The last few months had been normal. All the campers were recovering from the Giant War. She, along with Percy (and Nico) had been experiencing nightmares from Tartarus. The only time they could sleep properly was when they were in each other's arms. As Annabeth pulled out some of the designs she'd worked on the last week, Katie Gardner had come to her cabin and told her that Chiron had requested her presence in the Big House.

Annabeth had immediately gone to the Big House. She greeted Chiron, but she was surprised to see the other occupant of the room. It was her mother - Athena. Annabeth immediately knew she was not going to like what was to come. She bowed to her mother. Athena smiled and nodded.

Chiron cleared his throat. "Lady Athena has a quest for you Annabeth."

Annabeth's eyes widened, but before she could protest, Athena spoke. "Just hear me out. You'll see that it's the right thing to do."

Annabeth sighed but didn't respond. The Goddess took that as a sign that she would not be interrupted in her explanation.

She started. "We won the Giant War."

Annabeth rolled her eyes.

"But we did not do so without a few allies", the Goddess continued. This piqued Annabeth's interest. There was someone who fought in the War on their side and the Seven didn't know about them?

"You have heard of Merlin, the sorcerer. Not only is he real, but he also helped our cause in the War." Annabeth's eyes shot up at the mention of Merlin. He was a legend. A bedtime story. But so was she, wasn't she? It was possible that he was real.

"Shouldn't he be dead?" Annabeth asked.

The Goddess shook her head. "He was cursed with immortality. Fated to wait for The Once And Future King to rise again."

Annabeth processed this. Of course the Gods had cursed the most powerful warlock. "What does this have to do with me?"

Athena sighed. "Merlin did not agree to help us without something in return. He wanted history to be changed. He wished that he had been taken instead of Arthur."

Annabeth's eyebrows creased. "Wouldn't that change the timeline? It would create a paradox."

"The Council has come up with a solution for this. You need not concern yourself over it. The Gods promised to Merlin that Arthur would live if Merlin helped in the War. After the War was won, the timeline would be changed. But what we failed to mention to him was that the Olympians have no control over time. Time is Kronos' domain."

Annabeth sighed.

"However", Athena continued, "We can send a demigod back in time to change the events." She paused to gauge Annabeth's reaction.

"And that demigod is me", Annabeth realized. "Why does it have to be me? Why not literally anyone else?"

"The Council chose you Annabeth."

Annabeth glared at her mother. After a few seconds, her shoulders slumped in defeat. "Percy's coming too right? We can't sleep without each other without having nightmares."

With a sad expression, Athena shook her head. "I'm afraid we have the power to send only one demigod back in time. However Hephaestus and Hermes have created a mist spraying machine that will allow you to communicate with Perseus at any time you want. Iris has gladly agreed to help."

Annabeth closed her eyes letting the information sink in. She would be separated from her Seaweed Brain. She fought to hold back tears. Realising there was no other way, she made her mind up. If this was going to happen, then the faster, the better. She opened her eyes. "When do I leave? And how do I come back?"

Athena smiled. "I am very sorry about this. I was against the decision to send you." Annabeth did not respond. "Very well, you leave tomorrow at dawn. Be prepared and present at Thalia's tree at 6.00 am. Hecate will meet you there and give you anything necessary." With that, the Goddess disappeared in a flash of brilliant white light. Annabeth and Chiron hid their eyes.

Once she was gone, Chiron smiled sadly at Annabeth. Annabeth nodded to him and stormed out of the Big House. Sure she had agreed to the quest (not that she had had much of a choice in the first place), but it did not mean that she had to like it.

Thanks for reading! Please let me know if there are any mistakes and review!