Zhang Yi wanted to help with something else until the time of the war, but it was impossible for him to reach the Eternal Realm without at least waiting 500 years, and he needed at least 100 years to get Dao in another law that he understood.
Zhang Yi used the soul search technique on all the demons that died and thus got even more information about the demons, but these demons had no new information and only reinforced some of the things he knew.
Zhang Yi brought all the beasts back into his mental energy world and so they went back to the distorted timeline to fully recover their qi so that they could attack the other underworld and kill all the demons that were in the underworld.
This time it took a lot longer for the dragons to recover because they used the Dragon's Breath technique and still fought for more than 1 day, if it weren't for Zhang Yi using his clones to fight the stronger Eternal Realm demons for sure there would be many beasts that would get hurt too.
After two weeks everyone was finally able to fully recover if they used qi recovery pills that time would decrease to a few days, but using qi recovery pills in the higher realms could affect the warrior's cultivation base.
Since they had distorted time in Zhang Yi's mental energy world they had no reason to risk it and decided to wait for those two weeks, but in the real world, just over three hours had passed.
The demons certainly knew that there was a human and the beasts among the group of invaders that were killing the demons in the underworld, certainly the demons in that underworld were concerned about a possible invasion.
But they were still confident because they knew that on their side there was a demon on the seventh level of the Eternal Realm and several demons were stronger than the third level of the Eternal Realm, they had 46 demons from the Eternal Realm in this underworld.
Zhang Yi sent one of his clones to better check the information and just as he expected there were only 15 demons that were below the fourth level of the Eternal Realm, so Zhang Yi's clones couldn't kill many demons before Zhang Yi attacked.
But Zhang Yi was not so worried about it because this was the final fight and he had agreed with the three dragons that they would use a good part of their qi in this fight using the Dragon's Breath technique several times to kill several demons.
Unlike dragons also Zhang Yi and his clones could run out of qi because he still had the body refinement and mental energy that could maintain his defensive and attacking techniques, so their idea was to see how they could cause the most possible damage.
Zhang Yi also wanted to see the maximum damage he could do, but he was unable to use all his qi because he still had to maintain the distorted timeline that remained within his mental energy world.
Almost all of his techniques could be maintained only with his mental energy, but this was a technique that Zhang Yi created that needed his qi and mental energy beyond the laws because it was a technique that went against the natural law of time.
It was an interesting technique that had no effect against enemies and therefore had fewer restrictions to be used and was easier to use than the technique of decreasing the reaction time of opponents, after all even if the time passed more slowly for him and for enemies it would not change anything as a result of a fight.
Even if his clones used as much of their strength as possible it would not be even close to the strength that Zhang Yi had using Dragon's Breath in the last fights against the demons he had, so Zhang Yi deduced that he could kill maybe sixth level demons of the Eternal Realm.
But there was no way to prove it and he was pretty sure he couldn't kill Long Feng with this technique, so he couldn't kill a demon on the seventh level of the Eternal Realm even if he used all of his attack techniques at the same time.
After deciding this Zhang Yi first sent his clones into the underworld, Zhang Yi's clones went inside and remained hidden until they approached the demons that certainly do not expect an attack hours after discovering that the other underworld had been destroyed.
Zhang Yi's clones appeared already in the form of dragons and used all attack techniques including the dignity of the phoenix, and soon after having 126 times their total attack strength, they used the rain of feathers to attack the weaker demons.
The demons below the fourth level of the Eternal Realm died easily with the attack of the Zhang Yi clones, shortly afterward the clones did not stop the attack and decided to attack the demons of the fourth level of the Eternal Realm.
All of Zhang Yi's clones joined the attacks on just one demon who was on the fourth level of the Eternal Realm and that demon was easily killed, after all, he had received 220 attacks from Zhang Yi's clones at the same time.
After the second attack the demons started to react and Zhang Yi teleported with the other beasts and the second part of the attack started with Zhang Yi and the dragons attacking, Zhang Yi finally used the technique of the sacred domain and space and time restriction.
After Zhang Yi used the sacred domain technique all the demons below the fourth level of the Divine Realm died, there were billions of demons which shocked all the demons that survived in the underworld, shortly afterward two Zhang Yi clones went to attack the demons of the Divine Realm who survived.
Zhang Yi and the three dragons made their attacks, Zhang Yi used his attack techniques and used Dragon's Breath with 63 times his full attack and used the feather rain technique to attack the fourth level demons 20 times in a row of the Eternal Realm.
This time Zhang Yi attacked 4 more demons from the Eternal Realm with this technique and how the last time he managed to kill them, but soon after he used these techniques two more times and killed 8 more after the fourth level of the Eternal Realm.
So Zhang Yi and his clones had killed 27 demons of the Eternal Realm in a few minutes, there were still 19 demons left and the weakest of them was at the fifth level of the Eternal Realm, the dragons also started to attack as was agreed.
The dragons attacked the demons of the fifth level of the Eternal Realm, the demons could not resist the attacks of the dragons, and after a short time, the dragons attacked for the second time and killed 3 more demons from the Eternal Realm.
All of this happened in a few minutes and only 13 demons remained, it was 1 demon from the seventh level of the Eternal Realm and 11 demons from the sixth level of the Eternal Realm, only one from the fifth level of the Eternal Realm had survived the attacks of Zhang Yi and the dragons.
The demons did not have time to react to this attack and did not even know how to react to this attack, the demons now knew how quickly the other underworlds had been destroyed, yet the demons were still confident that they could survive.
That's because they had a demon at the seventh level of the Eternal Realm and had more demons at the sixth level of the Eternal Realm than beasts had warriors at the sixth level of the Eternal Realm, but when they thought they knew how to fight Zhang Yi and his clones were to face the seventh level demon of the Eternal Realm and 10 of the sixth level demons of the Eternal Realm.
Only two beasts went to face the remaining two demons and had 13 beasts that were free to face the enemies they wanted, the strongest demons tried to quickly kill Zhang Yi who was on the ninth level of the Eternal Realm and his clones.
But they quickly realized that the defense of Zhang Yi and his clones was very strong and his attacks did not even cause the least injury to Zhang Yi and his clones, once the demons knew how the other underworlds were destroyed.
The fight that was supposed to be the most difficult lasted a few hours with almost all the beasts attacking only one enemy demon at a time, even the seventh level demon cannot last long having his attacks defended by Zhang Yi and receiving Long Feng's attack. and the other beasts too.
This was a good fight to test how they could do if they used the Dragon's Breath technique in the middle of a war, with the help of Zhang Yi they knew they could fight with confidence even if they were at a disadvantage.