Tsukuyomi World
After finished using kamui, Ren Tianyou couldn't help but to kneel down on the ground on his one knee, place his right hand on the ground to support himself, and used left hand to cover his left eyes which was tingling with pain. A large amount of cold sweats dripped down from his forehead, and he was continuously panting heavily. The stinging pain he was feeling in his left eye was continuously irritating his nerves, forcing him to helplessly grit his teeth. This negative repercussion of using kamui of his left eye, caused endless trouble for Ren Tianyou.
Since he had already reached kage level, the amount of chakra consumed by the use of his left eye's kamui was basically not much of a problem, but the burden this doujutsu placed in his left eye was still extremely big. That distorting space attack of the left eye's kamui could be said to be an attack that is impossible to guard against, and even the strongest defense was just like a paper without any effect against this attack.
Nevertheless as this attack possess advantages, simultaneously it also possess disadvantages. It heavily burdens the eyes itself, and also heavily harms them. Unless Ren Tianyou advance his eyes to Eternal Mangekyo Sharingan, he couldn't get away with these disadvantages. Although he could use system points to prevent himself from becoming blind even without advancing to Eternal Mangekyo Sharingan, but he had no way to through erase all these harms his eyes itself had suffered, and these harms will have extremely big effect in the strength of Eternal Mangekyo Sharingan when he awakened it in the future. The reason why Ren Tianyou sometimes would rather expend a huge amount of his strength to deal with the enemy, in place of easily dealing with them by using his doujutsu were, one was Ren Tianyou wanted to increase his own strength, after all experiencing life and death fights would provide great help in improving his strength; second was to have a greater foundation when he advanced his eyes to Eternal Mangekyo Sharingan in the future, like this the strength of Eternal Mangekyo Sharingan he obtained would also be even more powerful.
...................
Just at this time, suddenly a huge energy fluctuation came through underneath the huge earthen lid that was created by the use of earth style ninjutsu by Ren Tianyou, directly sending this earthen lid flying. Shortly afterwards 3 huge dragon form light beam rose from that place, which hit that flying earthen lid. Then along with the loud 'hong' explosion sound, this huge earthen lid was directly bombed to disintegrate. And the small pieces of rocks flew about in all direction.
Along with the disappearance of earthen lid, the figure of Ximen Batian and other two whose whole body was emitting golden saint dragon battle qi became visible. And a powerful aura was quickly spreading in all direction from their their bodies. But when their gaze arrived at the headless corpse of Old Seven lying on the ground not far away from them, from which blood was still unceasingly flowing out, their bodies suddenly quivered, then their eyes instantly become red, and loudly roared, """Old Seven!""" Then they immediately started to run towards the side of the corpse of Old Seven.
Seeing Ximen Batian and other two going crazy, a sneer appeared on the face of Ren Tianyou, then coldly snorted, "Is it unbearable? Compared with those suffering you gave me, this is still far from enough." Finished speaking, he quickly made a series of hand seals.
"Katon——Gokakyu no Jutsu! (Fire Style—-Grand Fireball Technique!)"
Finished making hand seals, Ren Tianyou took a deep breath, and immediately spat out a blazing hot huge fire ball from his mouth, which advanced towards them in a high speed.
Seeing the path of huge fire ball spat out by Ren Tianyou, Old Four looked at the headless corpse of Old Seven lying on the ground in front, then he immediately stopped his steps and opened his mouth. After that along with a loud dragon roar, the golden lights of golden saint dragon battle qi all over his body suddenly rose rapidly and sharply, then the dragon scales on his body suddenly increased rapidly, and two very small dragon horn slowly stuck out from his forehead, "You damned bastard, I will tear you to pieces."

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In Different World with Naruto System
RandomAt Divine Wind Continent, there is cultivation system-douqi, illusion and magic. Ren Tian You was a fan of Naruto, and a single moment of carelessness caused him to arrive in different world. Unexpectedly, only to discover that his body possessed Na...