There is a secret level of the underworld. It is below the level of the skeleton army. It is below the area that Lord Garmadon Reigned. It is a level that even dragons fear going to.
Samukai was on this level.
The four weapons had not killed him. It is difficult to kill someone who is already dead, even with the combined power of the four weapons. Instead those killed while dead were brought to this level. If they were killed again they completely ceased to exist. It happened rarely so for the most part Samukai was alone. No army to control. No one fight. Not even anyone to obey.
The feeling of solitude grew and Samukai longed for someone to blame. But he had to admit, if only to himself, the only one he could truly blame was Lord Garmadon. He should have done away with him years ago. He should have. But he couldn't.
"Just one blow," he growled to himself, "Just something to say I am better than Lord Garmadon."
But even if he wasn't on this level, he knew he could not have such a blow. Only the ninjas had such a chance.
"Ninjas that I was foolish enough to fight," Samukai said angrily to himself, "I should have let them stop Lord Garmadon and taken the weapons later. Fool of me to think otherwise."
He then paused and calmed himself, "It may not be too late. I must get out of here. I must foil his army's next plot. While I hate the idea of helping those ninjas, it's the only blow I can get."
He then stood and started walking through the dark and the gloom. The path was rocky and uneven. Once in a blue moon he'd stumble across a skeleton lying inert. One who's spirit had disappeared forever. The thought sent chills up Samukai's bare spine, but he kept going. He knew of one way to get out.
Eventually he found what he was looking for, two ghostly wrestlers. Samukai kept to the shadows. For his plan to work, he could not let the wrestlers see him. After hours of waiting the wrestlers started to move. Samukai followed from a safe distance. Eventually they came to a lake and waded in. Samukai did the same. When he and the wrestlers submerged they were in Ninjago on a starless night.
Careful not to disturb the wrestlers upcoming combat, Samukai swiftly exited the lake. He shook himself dry and made his way through the hills in the direction of the ninja's Dojo.
Samukai was a leader. He could only foil any plots his skeletons come up with while with a group, preferably directing them, though Samukai wouldn't press his luck that far. Just gaining the ninja's trust would be difficult. Once he did though he could find out the skeletons' next plan and hopefully aid in ending it.
For 5 hours without rest Samukai walked. With no muscles his legs felt no fatigue or pain. Beyond the hills was a race field. The people who worked the fields were just waking up. Samukai made haste so not to be seen. If someone other than the ninjas saw him, no good would come of his trip. Beyond the fields was a village. Samukai slipped past its boarders unseen. Then he came the mountain and the thousands of steps that lead up it. The ninjas were up there. So Samukai continued up the stairs, higher and higher. At last he reached his destination.
Samukai could rest for a moment now, even if he could not rest easy. All he had to do now was wait for the ninjas.