Ohm

Ohm controlled the Ordeal of Iron against intruders on Upper Yard. It was by far the most effective of the four priests’ ordeals, having a 0% survival rate until Roronoa Zoro managed to triumph against it and defeat Ohm. Ohm set up pressure plates on the ground that triggered Milky Dials to instantaneously generate barbed wire made out of Iron Clouds, with the sudden growth of this wire resulting in victims being stabbed. Additionally, Ohm could create a giant cage-like structure to trap opponents known as the White-Barbed Iron Deathmatch, and he took part in the Ordeal by attacking with his sword, leaving just about all of his opponents overwhelmed by constant assault.

Haki

Ohm is a skilled user of Observation Haki, which is known as “Mantra” on the Sky Islands. He is proficient enough with this Haki to see the presences of everyone on Upper Yard, and could keep track of the statuses of his fellow priests and any intruders. In combat, he can easily find opponents attempting to hide from him as well as predict their next actions, allowing him to dodge their attacks and prevent them from dodging his.

Weapons

Ohm’s main weapon is the Eisen Whip, a sword whose blade is Iron Cloud generated by an Eisen Dial at the hilt. In addition to taking the form of a typical sword blade, Ohm can freely manipulate the cloud’s shape and increase its length and width as he pleases. This, coupled with his advanced Mantra, gives him the ability to strike opponents a great distance away from him, and since the cloud can change shape almost instantaneously and he can foresee his opponents’ next moves, he can strike opponents so quickly that very few can dodge him. Ohm has transformed his sword blade to resemble other weapons as it suits him, as well as into other tools like a wall. The hardness of the Iron Cloud makes the Eisen Whip extremely powerful in addition to fast and free-forming; it initially overwhelmed the tremendously strong swordsman Zoro, and when he ultimately managed to deflect it, such an action completely stunned Ohm. It also has enough cutting power to easily shatter through a thick stone wall.

As night began to fall, Ohm sensed with his Mantra that Shura had defeated Gan Fall, but Satori had been defeated by the Straw Hats in his Ordeal. He also noted that the Shandia guerrillas were launching an assault on Upper Yard, and said that they would not live to see the next morning. The three priests charged into battle against the guerrillas, with Ohm and his steed Holy attacking them in unison. While facing off against Wyper, Ohm was confident that the guerrillas would not make it to God’s Shrine, especially once night fell. Wyper made the decision to retreat, and Ohm moved to stop him, but Gedatsu came and told him to cease fighting as Enel had summoned them.

In the dead of night, Ohm, Shura, and Gedatsu arrived at God’s Shrine and began sparring with each other, and Yama berated them for doing so as he arrived, causing the priests to claim that the others were bringing them down. Enel then arrived and quickly overwhelmed the three priests with quick attacks before settling in. He announced that he would be opening Upper Yard for all of his subordinates to roam freely the next day, as the Straw Hats and Shandia would be continuing to invade it and it would be important to deal with them while the Maxim neared completion. The next morning, Enel’s forces went out to do battle against the invaders, with Ohm and Holy camping out in the Upper Ruins of Shandora on the large beanstalk Giant Jack. After two guerrillas came to the Upper Ruins and were defeated, the next visitor was Tony Tony Chopper of the Straw Hats, whom Ohm knew via his Mantra had already defeated Gedatsu.

Ohm moved to kill Chopper, and the reindeer pirate immediately started running as fast as he could. However, Ohm knew where Chopper was by using his Mantra and used his Eisen Whip to strike him down from a great distance away. Wyper then came traveling up Giant Jack to get to God’s Shrine, and Ohm attacked him to stop him. Their confrontation was immediately interrupted by the arrival of Gan Fall, who revealed that Enel had destroyed his shrine and asked Ohm what purpose this was for. Roronoa Zoro then crashed into the Upper Ruins from above, and the giant snake Nola charged in from below, causing a five-fighter standoff.

Ohm rode Holy into battle and the duo focused their attention on Zoro, but also had to fend off attacks from the other parties. Ohm then spotted Zoro running toward Chopper, and revealed how his Ordeal of Iron worked as Zoro encountered the surprise Iron Cloud barbed wire. Ohm used the Eisen Whip’s Iron Cloud to cut Zoro in the chest, and split up with Holy to cover more ground in the battle. When Zoro got distracted by the sudden arrival of other fighters to the Upper Ruins, Ohm took advantage of this to strike him again. Sensing a quickly dwindling number of fighters with his Mantra, Ohm activated the White-Barbed Iron Deathmatch, trapping all the combatants in the Upper Ruins in a cage made out of barbed Iron Cloud.

Zoro then got up despite his wounds, and Ohm resumed dueling with him. While assaulting Zoro with cloud sword strikes, Ohm took the time to take out one of the Shandia, thinning the fighters’ numbers more. Zoro then charged toward Ohm, but the priest turned his sword into an iron wall to stop him. Ohm turned the Eisen Whip into a variety of weapons to strike Zoro, using his Mantra to overwhelm the swordsman and dodge or counter his attacks. Zoro ran behind a giant stone wall, and Ohm encouraged him to pray to God before meeting his end; he then launched his blade through the wall toward Zoro. However, Zoro was unexpectedly able to deflect the blade, and then unleashed a flying slash attack called Hyakuhachi Pound Ho that blew through the crumbling wall and struck Ohm down, defeating him. Soon afterwards, Enel sent a blast of lightning up Giant Jack that demolished the Upper Ruins, causing the unconscious Ohm to fall to the lower Shandora city along with everyone else. After the conflict ended, Ohm, Satori, and Shura were sentenced by the Shandia to Cloud Drifting.