Deidara was feeling helpless and annoyed at Fujin's Wind Domain. He couldn't help but recall the events that landed him in this situation. He and Sasori were looking for Orochimaru to eliminate him at Nagato's orders. They successfully found his main base even before Konoha's forces located it. However, they were misled just like Konoha's forces by Orochimaru's little scheme.
Since they weren't as good as the Konoha ninjas at tracking, their speed was slower. Before they could find the sacrificial unit, the place was swamped by Konoha ninjas, trapping them in the area too. As they had no reason to kill hundreds of Konoha ninjas and attract unneeded attention, they stayed hidden.
Under normal circumstances, Konoha ninjas wouldn't have found them. Unfortunately for them, the army was led by none other than Fujin, who found it peculiar that the Konoha ninjas couldn't spot the two disturbances in space that he was feeling with his Space Time Sensing Technique.
In the few minutes they clashed, Sasori ensured that his chakra threads didn't enter the Wind Domain, allowing him to keep control of his puppets. Unfortunately, it was almost impossible to hit Fujin from 50 meters away. Any surprising traps in his puppets would be just too slow to reach him. Not to mention, the winds would just knock off all of his attacks. Even poisonous gases were contained by the winds. On the contrary, Fujin destroyed the dozen puppets Sasori controlled. That said, it wasn't as if Sasori didn't have any gains.
As for Deidara, he went through half of his explosive clay to get a feel of the Wind Domain. While they gained some intel, they failed to inflict a single scratch on Fujin. However, intelligence was a crucial aspect in ninja battles. While Deidara was still too young and inexperienced, Sasori's analytical mind quickly calculated ways to counter the absurd jutsu.
He thought, 'What a remarkable control over the winds. I have never seen anyone even remotely close to this level of mastery in Wind Manipulation. At first glance, this technique is completely invincible. However, every technique has weaknesses. His weakness should be Pain's and Kisame's ability to absorb chakra.
Unfortunately, neither is here. Luckily, there are still several other shortcomings. Even though the technique is very strong, it severely restricts his movement. He can't move the Wind Domain along with him at a fast speed. Otherwise, we would already be trapped inside it.
In addition, the Wind Domain doesn't extend into the ground for obvious reasons. So, he can't counter underground attacks that easily. However, Zetsu said that he also displayed the ability to fly. He could avoid underground attacks that way, but it would increase his chakra consumption, which is another weakness of this jutsu.
Even though it looks like the dome is entirely made of winds, it contains a large amount of his chakra which he uses to control the winds. While my poisons and weapons have no effect on it, Deidara's explosions have consumed a decent amount of that chakra. Unfortunately, Deidara will run out of clay as well as chakra long before Fujin shows any signs of exhaustion. However, we could employ this tactic when we have a significant numerical advantage.'
Fujin knew Sasori and Deidara were analyzing his technique. It was very much expected and one of the main reasons why Fujin kept most of his techniques a secret. However, this time he didn't mind it. He thought, 'Interesting. I wonder if he can find any counters. That'll be the way for me to improve this jutsu further and take it as close to perfect as a jutsu can be.'
Unlike his other techniques, the Wind Domain was going to be Fujin's core technique. Though he hasn't used it too many times publicly, he absolutely intended to do so whenever he faced strong opponents. It showed his confidence in the technique. Even if all its secrets were leaked, Fujin was confident that no one could break it.
Of course, nothing was perfect. Every technique would have some shortcomings. Especially a newly created technique like the Wind Domain. Thankfully, several capable individuals were willing to help him improve the technique. Hence, Fujin was looking forward to seeing how far he could perfect this creation of his.
Sasori grabbed a different scroll and opened it, summoning the puppet of the Third Kazekage. At the same time, he said, "Deidara, leave him to me. You hunt down those Konoha ninjas who escaped. Blow up as many as you can."
Deidara was surprised but had no reason to decline to do the one thing he enjoyed. His hands began eating more clay as it replied with a grin, "Leave it to me!"
At the same time, winds became chaotic within the Wind Domain. Fujin sighed and exclaimed, "The Third Kazekage… To think that you were the trigger that started the Third Great Ninja War. I wonder what Sunagakure would think when they learn the truth, hehehe."
Sasori didn't react to Fujin's provocations while Deidara created a large clay bird and jumped on its back. Large amounts of iron dust rose around the Third Kazekage's puppet while Deidara flew towards the Konoha ninjas. Sasori said, "Now, let me see how strong Konoha's Spectral Swordsman is!"
Fujin paid no attention to his words. Instead, he noticed something else. He thought, 'Hmm, not bad. He blocked my sight with that Iron Dust while secretly sending two puppets underground. Tsk, that's troublesome…'
Fujin didn't show any reaction to this sneaky move and instead replied, "It's a good tactic. Unfortunately for you, Orochimaru gave me some good tips to improve my technique some time ago."
The winds inside the domain finally settled and took Fujin's shape. Fujin used a third of the Wind Domain's chakra to create a Wind Clone. At the same time, a sixth of the Wind Domain's chakra manipulated some winds to create a cloak around Fujin's main body. In the blink of an eye, Fujin consumed half of his Wind Domain!
The changes surprised Sasori. Before he could react, strong winds blasted behind Fujin's Wind Clone as he disappeared from the Domain. Deidara's instincts warned him as he turned his head back. His eyes widened as he cursed, "What the fuck is that?"
The clay bird quickly flapped its wings, taking Deidara to a higher altitude and barely dodging the wind current heading towards him. To Deidara's surprise, the wind stopped and he saw Fujin's Wind Clone. The Wind Clone smiled and said, "We've just met, Deidara. Why are you in such a hurry to leave your new friend behind?"
Deidara frowned and cursed, "Who's your friend, bastard?"
Fujin's clone replied with a smile, "Me, of course. When the old Onoki heard that you went rogue, he went berserk and sent Roshi and Kitsuchi to bring you back. I was the one who stalled them so that you could enjoy your freedom. Yet, not only did you not say 'Thank you', but you also tried to run away after attacking me. Sigh, why are you so ungrateful?"
The clone's voice became sorrowful towards the end. Deidara's eyes twitched as he was left dumbfounded by the clone's words. For a moment, he couldn't even form proper thoughts. That's how absurd Fujin's clone was!
Deidara finally wondered, 'What in the hell? He stopped that geezer from coming after me? But, what's his connection? Isn't he from Konoha? Why would that geezer listen to his words?'
Fujin's Wind Clone chuckled internally at Deidara's expressions. Being younger than even Fujin, Deidara wasn't as good at hiding his emotions as the older ninjas. Needless to say, the clone was spouting this nonsense just to waste some time.
While the Wind Clone was very strong and could bully weaker ninjas and even force Jounins to retreat, Deidara was in a whole different league. Killing him with just the clone that contained around 5% of Fujin's chakra was highly unrealistic. Fujin just wanted to waste Deidara's time, chakra and clay while he dealt with the bigger and the generous threat.
While several high-profile battles happened simultaneously around the world, the rebels were wiped out quickly following the deaths of their leaders in the Land of Grass. Kagero, his students and Tsuchiro were all dead. Several ninjas tried to run away, but it was a hopeless prospect due to the Hyuga and the Aburame ninjas. Not a single one made it out alive.
The only survivors were among the ninjas who had been dispatched earlier to set traps and fake routes for the Konoha ninjas. While Konoha killed several of them, 3 dozen still remained. However, it didn't have anything to do with the Konoha forces. They had already fulfilled their mission requirements.
After storing the bodies of the rebel leaders, they quickly retreated. Now that Iwagakure was aware that Fujin was not present in the Land of Grass, the risk increased several times and they had no intention to wait and find out what decision Iwagakure would make.
Renjiro sent a few squads to Kusagakure to deliver the bodies and report the success while the remaining army moved towards the Land of Fire. Ryoichi retreated with the Kusagakure army as well and returned to his village.