Naruto: Transmigrated as an Uchiha, I Go Completely Crazy!
Transmigrated to become an Uchiha, bound to the Completely Crazy System.
Threatened by the night of clan extermination?
Uchiha Kaze turned his hand and killed Uchiha Sasuke and Uchiha Fugaku, and heavily injured Uchiha Itachi.
Since the village has already betrayed my Uchiha, then let's go completely crazy.
[Ding, detected Host's crazy thoughts, reward: Mangekyō.]
[Ding, detected Host's crazy behavior, reward: 2x Dōryoku.]
[Ding...]
...
Accompanied by the system's wonderful prompts, Kaze used absolute power to release the Kyūbi, crushing the Konoha higher-ups.
What? Other Shinobi villages want to take advantage of Konoha's internal turmoil to invade?
Kill, kill them all!
Uchiha Madara: Uchiha Kaze is more suitable to be the Uchiha Clan Leader than I am.
Senju Hashirama: My choice back then was truly wrong.
Black Zetsu: Dammit, where did so many Mangekyō come from? How am I supposed to go to this Konoha to hunt Bijū?
Akatsuki: One bag of rice...
Kaze: Resist my ass, everyone go die!
...
Early descending Ōtsutsuki Momoshiki: I don't know, I just arrived, and a group of Mangekyō chased me down to hack me.
Early awakened Ōtsutsuki Isshiki: Don't ask me, I am now Uchiha Kaze's Isshiki Lama.
When the Mangekyō illuminates Takamagahara, sure enough, my Uchiha should just...
Completely Crazy!