Uchiha Clan (KH:RTD)

The was once considered to be one of the most powerful clans in existence because of their Sharingan. But is now almost extinct. The only remaining members are Madara Uchiha and Sasuke Uchiha.

History
The Uchiha were one of the many mercenary clans for hire. Because of their Sharingan, the Uchiha clan came to be known as one of the two strongest clans, the second being the Senju clan. Madara Uchiha was particularly powerful, and, upon attaining the Mangekyo Sharingan, he took control of the clan. Under his leadership the Uchiha grew stronger, conquering whatever clans they came upon.

Abilities
The Uchiha were infamous for their especially strong and natural aptitude for anything combat-related, highly powerful aura, and their proficiency in fire techniques, having created several and using them more skillfully than any other. Their signature jutsu was the Fire Release: Great Fireball Technique. Clan members were not recognized as adults by the rest of the clan until they could successfully use this jutsu. The Uchihas were also highly known for their mastery of ninja tools. They themselves invented many shuriken techniques.

The Uchiha clan were most feared for their powerful Sharingan, which gives them the ability to see the opponent's energy, allowing them to analyze and copy their opponent's skills, along with a number of other abilities. Only a select few members of the Uchiha clan manifested the Sharingan. Due to their natural affinity for battle, and their proficiency with illusion techniques, many ninjas considered it more tactically favorable to flee rather than face an Uchiha shinobi in one-on-one combat.

Madara discovered that, by the death of one's closest friend, the Sharingan could be taken to its next level: the Mangekyo Sharingan. It gave the user great power, but slowly deteriorated their eyesight. Only by taking the eyes of another Mangekyo user could one's vision be restored. Itachi indicated that the intricacies of the Mangekyo Sharingan were only discovered after years of trial and error, implying that many Uchiha throughout history had made the attempt to gain the Mangekyo Sharingan