I do not own Percy Jackson, Heroes of Olympus, or the Avengers.

Author: The Sea's Avenger

Title: "The Sea's Avenger"

Chapter 16:

Waters above Lemuria

Poseidon stopped in his tracks as Oceanus swam before him. Triton smiled at his father fiendishly. "You truly are a disappointment Triton. Where is your mother?"

Triton chuckled. "She's at the palace."

Oceanus swam in front of Triton. "You don't get to ignore me, Poseidon. It is your time to fade. There is no one to save you. Your army is busy. You are all alone," as Oceanus finished speaking a dozen Sharkmen carrying energy weapons appeared behind Triton, leveling their weapons toward the god of the seas.

Poseidon raised his trident. Oceanus raised his spear before the Serpent Crown glowed once again, surrounding the Titan's body and his spear. He fired a blast of energy from his spear, striking Poseidon's trident nearly knocking the weapon out of his hands. Poseidon recovered quickly, firing a blast of energy from his trident toward the Titan; Oceanus stood still as the blast struck him head-on. The golden glow of the Serpent Crown intercepted the blast, absorbing the energy easily.

Poseidon's eyes widened when the blast from his trident had no effect on the Titan. "That's not possible."

"Oh, but is, the Serpent Crown gives me the power to reclaim what is mine; dominion over the seas and all life within it," Oceanus said. He swam a little closer to the Olympian. "You can surrender now and your demise will be painless, or you can fight me and I will make sure that your end will be filled with torment."

"Wow, is there a, 'How to be a Villain for Dummies', or do all villains have the same corny threats," Iron Man said as his boot jets powered him forward through the water followed by the other Avengers.

Oceanus frowned. "You bring mortals into this fight. You truly are desperate, Poseidon."

"Your use of a weapon from another Pantheon has made me quite desperate. I will take all the help I can get," he replied.

"Don't worry, Dad; you'll have some godly help as well," Percy said as he swam into view with Pontus and Thalassa at his side."

"Hello, nephew, it appears your evil and tyrannical ways know no bounds," Pontus exclaimed as Thalassa swam up to his side. She no longer looked like a mere mermaid; her body glowed with divine power.

Oceanus's blue eyes widened. "No, this cannot be how can you be here with your immortality returned?"

Pontus smiled, tilting his head toward the son of Poseidon. "Some children of the sea god are quite honorable and self-sacrificing." Pontus and Thalassa swam up to Poseidon and settled on his left side, while Percy swam up to his father's right. "We are here to see to your defeat."

Oceanus laughed. "You old fool, nothing can defeat me. I hold the Serpent Crown; Set's greatest weapon."

Poseidon shook his head. "You delude yourself if you believe you control that weapon. Set would never let anyone control it fully. You are the pawn; the tool for Set's power."

"I am no pawn," Oceanus yelled firing an energy blast toward Poseidon; Percy intersected his trident with his father's while the two Primordials crossed their weapons with Poseidon's as well. The blast struck them, but the combined power of the four weapons was enough to block the blast. "No, that's not possible."

"The sea knows evil when it feels it; you cannot win Oceanus. It is time for you to put down the crown and rid the seas of its corruption," Pontus said.

"Never!" Oceanus charged forward, bringing down his spear; the glow around his body turned blood red as his weapon struck Poseidon's, but the three other weapons once again joined the trident. Oceanus's spear struck the combined power of the two Primordials, the elder Olympian, and the demigod hybrid. The red glow surrounded all five of the beings caught in its wake. The red aura pulsed for a moment before the energy turned back on itself, surrounding the Titan, causing Oceanus to disengage.

He fell back screaming as the red aura grew more powerful, his spear turning back into a snake before retreating from its master. Oceanus screamed once again at the loss of his weapon. "No, I am your master; stop this." However, his pleas did not dissuade the power of the Serpent Crown. The aura grew more intense until an explosion rocked the waters above Lemuria. A powerful blast of power erupted toward the city below, causing the city to break apart as the bedrock beneath its foundations crumbled, sending the ancient city into the boiling lava that lay far beneath the seafloor.

Poseidon, Percy, Pontus, and Thalassa looked back to where Oceanus once floated in the water, nothing remained of him but the Serpent Crown. Triton swam toward the weapon. "Triton, stop, do not touch it," Poseidon yelled.

"I do not answer to you," Triton replied before he grabbed the crown. As soon as he touched the crown, the red glow surrounded him before a portal of swirling energy and water appeared. "No, what is this?"

Pontus shook his head sadly. "A portal to the Egyptian underworld. It is too late for you now." Once he finished talking the portal pulled Triton and the crown inside of it before closing the gateway to the other Pantheon's underworld. Pontus turned to Poseidon sadly. "I am sorry for your loss."

Poseidon had his eyes closed, opening them when he felt his youngest son's arm around his shoulders. He looked at Pontus. "Triton was lost to me for a long time. I will not mourn his death, but the loss of his potential."

Pontus nodded, looking around and noticing that the Avengers had defeated the remaining Sharkmen and the forces of Lemuria were retreating after the destruction of their city. "It appears the battle is one; the Great War between Atlantis and Lemuria is finally over."

Poseidon nodded. "Yes, my son is safe and the battle is won." He looked at Pontus and Thalassa. "Where will you go now?"

Pontus held his wife's hand. "We will explore for a while, I think," he said, smiling when Thalassa nodded in agreement.

"Both of you are welcome in Atlantis. Sally would be very happy to meet you."

Pontus smiled. "To meet the mother of such a hero as your son would be a great honor."

Percy blushed at the compliment, earning a smile from the Primordials and his father. "Well, you have my thanks and my best wishes for a safe journey," Poseidon replied. Pontus and Thalassa smiled as both waved at the Avengers, Poseidon, and Percy before swimming off at incredible speed. Percy smiled when the Avengers joined him and his father. Poseidon smiled at the sight of the Avengers, especially at his son's girlfriend. He raised his trident before the Army of Atlantis disappeared. He raised it again before a golden glow surrounded himself and the others. They appeared on top of the floating platform on the surface of the ocean. Poseidon pulled his son into a hug. They pulled away a moment later. "I'm so happy you're safe, my son."

Percy smiled. "Thanks, Dad."

"Not to distract from this Hallmark moment, but what the hell happened down there?" Tony asked his voice filled with a mixture of sarcasm and downright bewilderment.

Poseidon smiled. "It appears that the Serpent Crown did not like to lose, so it destroyed Oceanus and Triton, plus Lemuria itself."

The faceplate's of all the Avengers opened, including Annabeth's. Percy rushed forward, kissing he daughter of Athena passionately. Tony's eyes narrowed at the sight. "You came to rescue me," Percy said.

Annabeth's cheeks were flushed and her lips were swollen. "Yeah, I guess you really didn't need us."

"On the contrary, the Avengers gave us the time to defeat Oceanus, for that you all have my gratitude," Poseidon said.

Steve smiled. "We were glad to help, your Majesty."

"Poseidon, just Poseidon."

Steve nodded. "Dad, do you think you can transport us back to campus?" Percy asked

Poseidon nodded. "It would be my pleasure."

"I hate to interrupt, but could you send us all to Avengers Tower?" Tony asked hopefully.

Poseidon raised an eyebrow at the request. "Why so?"

"Well, I was going to ask the kid." Tony began, receiving narrowed eyes from Percy. "The young man I mean. I wanted to ask him to join the Avengers."

Poseidon turned to look at the shocked expression on his son's face. "It is up to you my son. I will not stand in your way."

Percy smiled at his father; happy that he finally let him make his own decisions. "Thanks, Dad, but I'd like to consider the offer."

"As you wish son," Poseidon said before raising his trident, engulfing the three mortals, the demigoddess, and his son in a golden glow. They disappeared a moment later. Poseidon smiled at the calm seas around him; it was a good day.

Avengers Tower – New York City

The five heroes appeared in the main lounge in the Avenger's suite on the top floor of the high rise. Tony sighed as he led the other armored heroes further into the building to change out of their armor. Percy looked at himself, still holding his trident and wearing his armor. He closed his eyes before his trident became a ring once again and his armor disappeared before his necklace appeared around his neck. He opened his eyes and sighed. He wore the same tattered t-shirt and shorts that he wore in the Lemurian dungeon, but before he could comment a golden glow surrounded him disappearing a moment later to reveal Percy now wearing a blue shirt with a golden trident on the front with blue jeans replacing the shorts, and sandals covering his bare feet. He smiled. "Thanks, Dad," he whispered.

"What was that?" Tony asked as he walked in with Annabeth at his side.

"Where are the others?" Percy questioned.

"They had work to do, but you'll see them later," Annabeth replied.

Tony stepped closer to Percy; he still didn't like that this teenager was a good four inches taller than him. "So, about that offer?"

Percy smiled. "It's a yes on two conditions."

Tony narrowed his eyes. "What conditions?"

"That I can go back to school and that this decision does not affect my relationship with Annabeth."

Tony didn't say anything at first until Annabeth elbowed him in the ribs. "Damn, sorry for being a protective father," he said, earning a death glare from his daughter. He sighed, knowing damn well that he'd lost. "Okay, I agree to your terms."

Annabeth hugged her father tightly. "Thank you, Daddy," she said. It had been a long time since she called him that, making him smile with fond memories of his little girl. She walked to Percy, wrapping her arms around him tightly. She narrowed her eyes once again when her father didn't take the hint. "You can leave now."

Tony's eyes widened. "What?"

"You can leave, Dad; don't you have work to do?"

"Well," before he could finish his phone rang. He answered, noticing that the call was from Pepper. "Hello, Dear… yes, well I need… you can do this without… no, I'm not… hey, now that's… okay Dear… yes, I'll be there in five minutes." He looked back at his daughter, but she was busy kissing her boyfriend. "I'm just going to go." They both waved him away. He sighed, walking away. "I'm so whipped."

Percy and Annabeth kept kissing until her father entered the elevator and the doors closed before they broke apart. "He's gone," Annabeth said.

Percy smiled. "Good, I like your Dad, but I'd rather be here with you, alone."

Annabeth returned the smile before a thought came to her. "Thalassa said that you're immortal."

Percy hushed her by putting his finger on her lips. "I was immortal. That ceremony on Olympus made me one, but no one told me."

"Did your Dad know?"

"I'm not sure, but I think not."

"What do you mean that you were immortal?"

"I gave it up to free Pontus."

Annabeth's gray eyes narrowed. "Why would you do that?"

"He needed it to become whole again, besides I never wanted to be immortal."

"I don't understand. Your parents are immortal; wouldn't you want to join them?"

Percy smiled. "I want to live my life and then rest in the underworld. Besides, you're not immortal and I couldn't live forever without you by my side."

Annabeth's heart soared. "Why is that?" she asked hopefully.

Percy held her shoulders. "I love you, Annabeth Stark, is that so hard to believe?"

Annabeth shook her head. "No, I guess not." She leaned forward on her tippy toes and kissed him. She pulled out of the kiss leaning her forehead on his as Percy leaned down because of the height difference. "I love you too, Percy."

Percy smiled before kissing her again. "I guess we need to get back to school."

Annabeth shook her head. "It's Friday afternoon, maybe we can stay here for the weekend."

"I'd like that." Annabeth's brow furrowed. "What's wrong?" Percy asked worriedly.

"So, you're an Avenger now, but you need a superhero name."

Percy nodded. "Yeah, I forgot about that, any suggestions?"

Annabeth smiled as she thought of a perfect name for him. "How about Submariner?"

"Submariner, huh?" Annabeth nodded. "I like it."

AN: Repulsors spent and power cells drained, that's the end of this story, thank you so much to all my readers.