The first phase of "One Piece" Wano arc made a lot of revelations from the origin of Luffy's Haki to the Straw Hat's imprisonment. The anime series' next big phase will show the fan-favorite pirate inside a cell along with Eustass Kid.

Fans witnessed Luffy's biggest battle when he faced Kaido in "One Piece." Unfortunately, the Gear Fourth was no match to General of the Beasts Pirates' strength. The Straw Hat Pirates' captain ended up "knocked out cold," per Comic Book.

Trafalgar Law tried his best to save Luffy in "One Piece," but Hawkins stopped him. Luffy was left unconscious and in Kaido's mercy. Kaido believed Luffy was still looking at him, so he decided to lock him in prison to break his spirit.

Luffy was sent into a mysterious prison in Wano in "One Piece." He was tied up and handcuffed when he got thrown in a cell with Eustass Kid. The notorious pirate was another "Supernova of the Worst Generation," and he also had issues with Kaido.

Meanwhile, Kaido also learned that Luffy possessed the Conqueror's Haki, so enemy pirates got knocked out when getting near him. However, the Strongest Creature in the World didn't reveal what he was going to do with it.

"One Piece" revealed the Conqueror's Haki's origin, and found out that Luffy was not the first person to use it. CB reported that Oden Kozuki was one of the rare Haki's originators.

Lord Oden used Haki before he got executed. In "One Piece," Kaido managed to bring Luffy down. But even though he was unconscious, he could still use Conqueror's Haki. One of the top thieves in Wano was seen eyeing Luffy after he managed to knock out Kaido's followers with Haki. Here, Haki's origin got revealed.

"That was Lord Oden's ability! Did that unconscious brat use it," the old swordsman said in "One Piece." Kaido also recognized Conqueror Haki's power and asked the swordsman if he also has the ability to use it. "We don't need that many conquerors," he declared.

As "One Piece" revealed the Conqueror Haki's origin and mentioned the history of the former Wano ruler, Oden, fans wanted to know more about him. Oden was said to be part of a list that involved Charlotte Linlin and Edward Newgate.

So, it seemed like Oden was more powerful and influential than fans thought him to be. The anime series' supporters have to wait a little more for the continuation of "One Piece" Wano arc.