Name: Sharingan
Requirements: 3-point kinjutsu training for each stage
Description: Sharingan is the bloodline limit doujutsu of the Uchiha clan. It possesses several powerful abilities, though it is developed through three stages. When just awakened, it is in Stage 1, with only one tomoe located above the pupil; in Stage 2, another tomoe appears, and they are now located to the left and right of the pupil; all three tomoe appear in Stage 3, and they are located in a triangle shape around the pupil: one directly above and the other two to the bottom left and right. The Sharingan is activated by sending some chakra into the eyes. It does not cost much, but only a true Uchiha can have it activated for prolonged periods of time without risking their health.

Stage 1: The initial stage of the awakened Sharingan, it only gives the clan members some basic abilities. Among these is the ability to see movement somewhat faster than what they would normally be able to and to detect chakra. This allows them to react better and gives them higher accuracy than most. Thanks to the chakra detection ability, many camouflage techniques are rendered ineffective. This stage also allows them to see clearer than normal.

Stage 2: The second stage of the Sharingan allows those who possess it to see everything with even better clarity, including objects that would normally fall out of sight because of their speed. This allows them to dodge and attack as if their taijutsu skills were one step higher. Additionally, visual genjutsu of rank B or lower can be dispelled instantly, without any chakra cost or a need for a special technique.

Name: Sharingan Copy Technique
Requirements: Sharingan Stage 2; 3-point kinjutsu training
Description: This technique is based on the Uchiha's ability to see chakra and fast movement with great clarity. It lets them memorize the specific movement executed by someone, the hand seals they used and the flow of chakra inside their body, which in turn allows them to copy any technique they have seen even once.
Every Uchiha has 5 extra jutsu slots that can only be filled with copied techniques. They can convert some of their normal slots into copy slots, but not vice versa. The copied techniques can only be used when the Sharingan is activated.
Sharingan Stage 2 only allows for copying of taijutsu and genjutsu, while Sharingan Stage 3 allows one to copy any technique. However, some limitations still apply. First, the Uchiha must be able to use the jutsu they want to copy, meaning they must meet the skill, rank and element requirements for it. Second, no more than one jutsu can be copied per post. Third, this ability can't be used in the same thread it was learned. Fourth, only Mangekyo Sharingan can copy kinjutsu.