A/N: Hello there, readers! So yeah, I'm writing another Percy Jackson and the Olympians fanfic. This, unlike what I said before, will feature Percabeth most of the time, but will also introduce a new half-blood, Lester, who will be the real center of this story. But don't worry; our beloved Percabeth will always be there.

The itch I mentioned is this: Wise Girl's Seaweed Brain and Darkness Arising fused together, producing this. The two stories merged into one so I have no idea how far this story will go, but I won;t worry about that now.

This story will revolve around Percy, Annabeth, Calypso, and Lester. There will still be the love that you've grown quite fond of in Wise Girl's Seaweed Brain but this will also have danger, deaths, sacrifices, tragedies, losses and a quest. A whole new story that is connected to the previous one.
WARNING: If you haven't read Wise Girl's Seaweed Brain yet, I suggest you do before reading this one.

With that aside, I give you . . .

WISE GIRL'S SEAWEED BRAIN 2.0:

DARKNESS ARISING
Chapter 1: HERE COMES THE NEIGHBORHOOD

PERCY

I stared at her, dumbfounded.

Calypso, here at Camp Half-Blood? Jeez, Annabeth and I had just been through something and Calypso had shown up? What kind of sucker fate do I have? Someone's got to be toying with me. Someone's got to be.

Annabeth stood up and faced her. I reached up and tried to hold her hand but she had already taken a step forward. I stood up but fell to my face just as quick. Good thing Chiron managed to catch me. "Annabeth . . ." I said.

"So you're Calypso," Annabeth said.

Calypso smiled. "I take it from the way Percy held you that you're Annabeth." She held out her hand. "I'm pleased to finally have the chance to meet you. You're the only one he was able to talk about while he was with me."

Annabeth raised an eyebrow and turned to me. "Was I?" Calypso nodded. "Oh, well."

Calypso smiled. "I assume that you two are finally together now?" Her face was guarded and her tone was flat. I frowned for a while about that. Whenever Calypso talked, there was always the sweet, playful tone in her voice, but now it wasn't there. I wondered what could've caused for that to disappear.

Annabeth nodded. "We've been together for almost six months now."

Calypso turned to me. Her eyes were sad. "I'm happy for you, my brave one. I hope you know that."

"Um, thanks," I murmured.

Annabeth went back to me and helped me up. "Come on now, Seaweed Brain, you need your rest."

Calypso seemed to see for the first time that I was injured. "What's happened to you, my hero?"

"Um . . ."

"Can you not refer to my boyfriend as your hero? You make it sound like he's your property," said Annabeth. I squeezed her hand.

"My apologies, then," Calypso said. "I just grew accustomed to his company. He was the best hero that had washed ashore to my island."

"Can we please not talk about me like I'm not here?" I asked. "I feel totally uneasy."

Chiron cleared his throat. "Annabeth," he said. "As much as I agree with Percy having his rest, I'm afraid that has to wait for another hour, my child."

Annabeth frowned. "What do you mean?"

Chiron looked pain. "There is a small matter we need to discuss first." He straightened back to his full centaur height. "Come on and we'll talk in the Big House."

Inside, Chiron prepared hot chocolate.

I sipped from my cup, shuddering as the sweet liquid warmed up my body. Annabeth helped me prop my leg on a chair. She even massaged my left thigh, knowing that when I sat for a long time, it got numb. I didn't know why touching in front of Calypso made me feel uncomfortable.

Chiron sat back on his wheelchair, the thing magically containing his horse-half. He took a long sip from his cup before setting it back on the table. For a while, nobody spoke until Annabeth asked, "Chiron, this half-blood you're asked to rescue, do you have any idea who his godly parent might be?"

I was glad my girlfriend asked the question. I was curious myself. I mean, whose half-blood would need Chiron to personally pick him up? He must be pretty powerful. And dangerous.

Chiron's expression turned calculated. "I do," he admitted. "Each guess is more unlikely as the previous one." He cleared his throat again, like he was trying to swallow a hairball. "The thing, child, is that this half-blood had shown tremendous power, one that if left untrained, can cause some serious destruction."

"Is he more powerful than Percy?" Calypso asked, her eyes trained on my face. I tried not to blush on that.

Chiron didn't answer.

"Chiron?" Annabeth called. Everyone always said that I was the most powerful half-blood alive. Being a son of Poseidon, I have power over water. I could control it as easily as stretching a muscle. In the middle of the Titan War, I'd gain another one: I could summon hurricanes. Those, included with my fighting abilities, made people think that I was pretty dangerous. But I didn't think so. I mean there were Thalia and Nico. And my girlfriend, of course. She was a whole lot more fierce than I was.

"In ways more than one, he is," Chiron said after a while. Chiron was one of the people who thought of me that way, so if he said that this half-blood is more powerful than I was, then he must be a son of one of the major gods.

"A son of Zeus, perhaps?" Annabeth guessed. "I mean, he's the one who always have trouble with keeping up with his promises."

Thunder boomed outside. "Um, Annabeth, I wouldn't say things like that . . ." I said. Normally, it was Annabeth who had to keep close attention to what I was saying about the Olympians since I have a tendency to anger most of them, but since Annabeth told me how things went down when she asked for the gods' help to heal me, her attitude towards most of them had changed.

"No," Chiron said. "He is not a son of Zeus, that I'm sure of."

"Then who?" I asked.

"Hades' perhaps?" Calypso suggested. "He is a lone god. It won't be a surprise that he would want company. He does not have a child for the past seventy years, does he?" I wondered how Calypso knew about the Big Three's pact, then I remembered that she said that once in a while, Hermes visits her to bring in news.

"He has a son, Nico," I informed her. "As far as I know, Nico is more than enough for the god of the Underworld. I'm not sure if that's in a good or a bad way."

"If he's not a son of Zeus or Hades, then who could his parent be . . .?" Annabeth mused. The three of them looked at me.

"What?" I asked. "You think he's my brother?" I looked at Chiron. "Did he, by any chance, show any power over water?"

Chiron fell silent. I knew that face. He only wears that whenever there's a dangerous information he's about to share. "See, that's the matter, my boy, this half-blood can usurp any kind of power."

"What do you mean?" asked Calypso.

Chiron took a deep breath. "You three must promise that this will stay inside the four corners of this room. No one can know."

"I promise," Annabeth, Calypso and I said together.

"I have asked some of the campers' help while I was trying to get Lester here," he said. "Drew, Clarisse, Lou Ellen, Katie, even Thalia and Nico helped." Chiron paused, looking at us like he was asking if we would stop him. But we didn't. "He was once wounded and Will tried to heal him but . . ."

"But what?" I asked.

"His power didn't work on him," Chiron said. He looked away. "The truth is, none of their powers did."

"What?" Annabeth exclaimed.

"Who's powerful enough to survive Clarisse's dead warriors? Or Nico's zombies? Or Thalia's lightning? I mean, I haven't seen anyone who can resist Drew's charmspeak," I said.

"This roots back to his god parent," Calypso said. "If we find out who his parent is, we might shed some light into this mystery."

"That's the problem," said Chiron. "There's no possible way we can find that out unless his parent claims him."

"Why not?" Annabeth asked.

"There's some kind of magic surrounding him, shrouding him in mystery," Chiron said.

"Who would do that?" Calypso wondered.

Suddenly, my conversation with Melinoe came back. "You must know that you haven't faced the greatest threat yet. The one whose magic is trying to eliminate you is by far the most powerful . . ." I didn't know why but I felt like this one's connected to that.

"It's powerful enough to even mess with the Fates," Melinoe had said. If that enemy was powerful enough to conceal me from the Fates, then it must be the one concealing this half-blood Lester.

"They're the same," I muttered.

Three pairs of eyes looked at me. "What are you saying, my boy?" asked Chiron.

Then, of course I had to tell him. Annabeth knew this, of course, but hearing it straight from me seemed to shock her. When I was done, she said, "You talked to the goddess of ghosts? Why didn't you tell me about it?"

I sighed. "Look, Annabeth, that's not what we need to talk about."

"He's right," Calypso said. Annabeth glared at her.

"She's right, Annabeth," said Chiron. "We need to get Lester here at Camp as soon as possible. The longer we leave him out there, the greater the risks are. He needs to be trained, now of all times."

I frowned. "What do you mean now of all times?"

Chiron bowed his head. "I have said more than enough, Percy. Knowing this kind of thing is very dangerous, for reasons you cannot know yet. I promise that when the right time comes, I will be the one to share them to you."

Annabeth and I nodded.

"Okay, as I've said, as soon as I'm recovered, I will go and take this Lester back here," I promised. "If you can do anything to make my leg heal faster, the better. I can go tomorrow if you heal me now," I told Chiron.

"No way," Annabeth said. "Seaweed Brain . . ."

I looked at her. "Look, Annabeth, I know you're worried about me, but please don't be. We don't have a choice; we need to get Lester here. This one's bigger than us alone. There are great powers at play here. Please, trust me on this one."

Annabeth sighed and touched my face. "All right," she said. She then leaned to me and kissed my lips. "Just promise that you'll always come back to me, okay?"

I smiled. "I promise." I looked at Chiron. "So, are you going to heal my leg or what?"

"Percy, as much as I know that Lester needs to be brought here, I also know that you deserve a break," Chiron said. "I know what you've been through, my boy, and rescuing Lester will be the beginning of something big. If we start now, there won't be any pause in this. Besides, I'm still gathering information about this so we need to take some time off for a while. And don't worry about him; I've sent someone to watch Lester. Right now, I'm giving you a week to recover. After that, no matter what happens, we will make a rescue attempt. No, not an attempt, we will rescue Lester and bring him here."

I sighed in defeat. I knew there's no possible way to convince Chiron once he'd made his mind. "Okay," I said. "One week from now and that dude will be here at Camp. Where does he live, by the way?"

"Bronx," said Chiron.

"That's not far from our apartment," I said.

"I know," said Chiron. "And I want you to promise me that you won't take things on your hand and meet him without my permission."

I scoffed. "You know me too well, Chiron."

Then Calypso made her presence known again when she asked, "Where am I going to spend the night, Chiron?" I looked at her. "Where do you sleep, my – Percy?"

"Um, in my cabin, Cabin Three. I'm alone in there," I said.

"What's that supposed to mean, Seaweed Brain?" asked Annabeth.

"Um . . ."

"Can I sleep in there with you?" Calypso asked, tucking a lock of hair behind her ear.

"Absolutely not!" Annabeth protested. "Chiron, tell her about the rules."

Chiron smiled. "My lady," she said to Calypso. "It is against the rule of this Camp for two campers of the opposite sex to be alone in a cabin, unless they are siblings."

"But I am not a camper," said Calypso.

"I know," Chiron said. "But you are a lady and Percy is a boy. You cannot spend the night together alone."

Calypso exhaled. "Very well. Then I guess I'll stay here," she said.

"My pleasure," said Chiron.

He and Annabeth walked me to the door of my cabin. Annabeth kissed me goodnight. "I'll see you tomorrow, Seaweed Brain," she said. "'Love you."

"Same here," I said. I watched her walk away. When she was out of earshot, I asked Chiron the question I wanted to voice out, except that I didn't want Annabeth to hear it. "Tell me, Chiron, is the one concealing Lester an enemy? Because I'm sure as hell that she is."

"She," Chiron said. "Melinoe informed you that our enemy is a she."

I looked at him, carefully watching his face. "You do know who this enemy is, do you? And please don't try and lie to me about it." Chiron didn't answer. "Melinoe said that she is more ancient than the gods, even the Titans themselves. I have an idea who she is, Chiron."

"Do not speak about her, my boy," he said.

"It's Gaea, isn't it?" I asked, not minding him.

"Percy," he said in a quiet voice. "I'm afraid that the enemy we are speaking of is older than Gaea herself."

[I'm sorry it's kind of short but everything needed is here and I hope you'll like it and stick with me the way you did with Wise Girl's Seaweed Brain.

Next - Chapter 2: HELLO, COLD WORLD]