Sharingan

Name: Sharingan
Origin: Uchiha Clan
Type: Dojutsu
Appearance: The sharingan has a crimson iris, however each level has an additional tomoe. The Uchiha have normal eyes and when activated it becomes a crimson red iris, the first stage has only one tomoe, the second gains a second tomoe circling the pupil, and finally the third stage and final stage which has three tomoe around the users pupil.

Description:

Stage 1 - First Tomoe
Ability: The user is able to detect irregular effects on people, meaning they can tell when someone is experiencing genjutsu. They can not see chakra like those who have the Byakugan.
Obtaining: The user must experience fear - 500 Words to unlock solo (Genin May start with this if given a reason in history)

Stage 2 - Second Tomoe
Ability: The user can copy basic movements such as pencil movements and lip movements, meaning they could copy someone writing intel or discussing information. The user also increases their speed by 1, allowing them to perceive incoming attacks or even react faster.
Obtaining: The user must experience hopelessness - 1,000 Words to unlock solo (Chunin May start with this if given a reason in history)

Stage 3 - Third Tomoe
Ability: The user is able to copy almost any jutsu they see, memorising ninjutsu, genjutsu, and taijutsu with near-perfect accuracy. They can then either perform that jutsu or modify it to suit their needs. Again, Sharingan users need the prerequisite abilities before they can mimic a jutsu they have seen, and for that reason they cannot, for example, reproduce kekkei genkai abilities they do not have or nature transformations they haven't learned to perform. It also allows the user the abilities above, with the increase of speed being 2 instead of 1.
Obtaining: The user must experience a need in strength - 2,000 Words to unlock solo (Jonin may start with if given a reason in history)

The Otsutsuki Clan can be born with the power.

Chakra Cost:

Stage 1 - 10 Activation, 15 Each additional post, Incomplete version

Stage 2 - 10 Activation, 10 Each additional post, Incomplete version

Stage 3 - 10 Activation, 5 Each additional post, Complete/Mastered version