Prologue

Deep in the mountains. Under the ground. Lies the the realm as known as the Underworld, which is ruled by Lord Garmadon. The four-armed figure sat on his throne as he was about to start his training to his apprentice, Lucas Wu. Lucas, the water ninja, who sacrificed himself to save his father, Sensei Wu, from death and paid the ultimate price as being Garmadon's apprentice. Garmadon watched as Lucas tied a blindfold over his eyes and five sand dummies fell from the ceiling and hung in front of him.

"Remember to use your ears; not your eyes to fight." The dark lord began the lesson.

Lucas didn't nodded as he knew the lesson from his father and drew out his two golden weapons from his belt; The Sai's of Water. He stood there as if time had stopped on him, concentrated his surroundings, and charged at the dummies. He sliced at a dummies in the chest. Once he heard a rip sound, he used his other sai to stab it in the back and continued to charge at the other dummies. As he charged, twirled his body to slice the dummies, he could hear the cloth wrapped around the dummies rip as he made each slice and stood back at his spot. He heard another dummy fall from the ceiling and hung a few feet behind him. And without removing his blindfold, he turned his body around and threw his sai's, like knives, and aimed them at the dummy.

Thump. Thump. Lucas knew his sai's made contact with final dummy, removed his blindfold, and stared in shock to see the dummies he sliced were his used to be family. Each dummy had a picture of the ninja's and samurai's face and sand poured out from each cut he made on them. Kai's had a slash on his chest and sand poured out, front and back, when he stabbed it in the back. Jay's mouth was missing and sand spilled out everywhere; deflating his head. Cole's lower abdomen was losing sand fast. Zane's had two puncture wounds on his chest and sliced into an X-formation. And Nya, her dummy was losing sand from the back as Lucas sliced her from behind.

But the last dummy was the most shocking one of them all. The dummy he struck in the chest was his father. He walked up to retrieve his weapons and when he pulled them out, sand didn't pour out of the puncture wounds; but instead blood poured out. The metallic smell of the crimson liquid dripping on the floor made Lucas light-headed on the thought of his real father being struck with these weapons. Lucas removed the cloth on the dummy to reveal a donated blood bag from Ninjago City Hospital. Lucas was curious why his master filled the dummy with blood and not sand, but realized he did it to break him. He didn't show his emotions to his master, but inside he was in pain to idea of his family, and he'll have to destroy them in the future.

Garmadon sat on his throne in amazement on Lucas's training. He stood up and desended down the steps to congratulate him of his performance.

"Bravo, bravo." he says while clapping, "You're improving my apprentice."

Lucas ignored him, cleaned the blood of his sai's on the dummies shoulders, placed them in his belt, and knelt down to one knee to his master.

"Anymore training...master?" he asked.

"Not anymore. Get some rest now."

Lucas stood up, bowed, and started to leave but Garmadon stopped him before he left the throne room.

"Before you go, I have an announcement."

"What is it, master?"

"I have come up with a new plan to rule Ninjago and I'm sending you on your first assignment to retrieve it for me. But if the ninja intervene, you know what must be done."

Lucas didn't turn his head to face the dark lord. His head dropped down as he knew what he meant to do with the ninja's, even to his cousin, Lloyd. He hoped the little green ninja didn't get himself into a lot of trouble without him there to protect him since he left. But he knew his brothers, the ninja, will protect him at all cost.

"Yes my master." he said and left