The Sharingan
The mighty Dojutsu Kekkei Genkai of the Uchiha clan, the Sharingan is a closely guarded ability. It grants the user immense visual prowess, allowing them to dodge attacks and make decisive strikes. It also allows one to see chakra, and a skilled user can even use Genjutsu through their eye.
A Sharingan has multiple stages that are unlocked through various ordeals. These stages increase the strength of the Sharingan.
Stage 1 (Manifests at 2nd level, 1 chakra point): You unlock the ability to activate your Sharingan. Using an action on your turn, you spend 1 chakra point to activate your eyes. The effects of your eyes last for 1 minute. Your abilities are as follows:
Add 1 to your armor class and attack rolls.
You can see if a creature is under the effect of a Genjutsu. You must use your action to observe a creature. After your action is spent, you know if that creature is under a Genjutsu.
You can faintly see chakra color.
Stage 2 (Manifests at 5th level, 2 chakra points): You maintain the abilities from Stage 1, and gain the following abilities:
Add 2 to your armor class and attack rolls instead of 1.
You gain advantage on Dexterity Saves while your Sharingan are active
Copy: You develop the ability to copy Ninjutsu and Taijutsu when you see them used. When you see a Ninjutsu or Taijutsu you wish to copy, you must use your reaction to make an intelligence (arcana) check with a DC of 10 + the rank of the jutsu used (D=2, C=3, B=5, A=7, S/S+= 9). If you succeed, you successfully copy the jutsu and can add it to your jutsu list. If you copy a Ninjutsu it must be one of the five basic natures, or it can be a Kekkei Genkai if you have access to the related jutsu list. Once you take a long rest, your knowledge of this jutsu dissipates.
Stage 3 (Manifests at 9th level, 3 chakra points): You maintain the abilities from Stage 2, and gain the following abilities:
Add 3 to your armor class and attack rolls instead of 2.
While your Sharingan is active, you can make an additional attack when you take the attack action.
Sharingan Genjutsu: You target a creature within 30 feet of you as an action. It must make a Wisdom saving throw against your Genjutsu DC. If that creature fails, it becomes paralyzed for 1 hour or until it is released from your Genjutsu. A creature immune to the charmed condition is immune to this effect. If the creature takes damage, the creature is no longer paralyzed. A creature that is blind or is immune to being charmed or charm effects automatically succeeds on its saving throw. Once a creature is affected by Sharingan Genjutsu, it cannot be affected again for 24 hours.
Stage 4 (Manifests at 13th level or when you witness a catastrophe or suffer a loss, 4 chakra points): You maintain the abilities from Stage 3, and gain the following abilities:
Add 4 to your armor class and attack rolls instead of 3.
Add 2 to your Dexterity Saving Throws.
Your Genjutsu sense is passive and no longer requires an action to use.
When you use your Copy ability, you retain the jutsu for an unlimited amount of time.
You can use your Deflect Missiles ability without using a reaction while your eyes are active.
When the sharingan is active, and the duration of their activation ends, you can spend the required chakra to keep them active requiring no action.
Non-Uchiha Users
It is possible for non-Uchiha to possess a sharingan. It requires them to implant a sharingan into their skull, which means they must have room for it (i.e. missing/removing an eye). The sharingan functions as it normally would for an Uchiha, however it is more taxing for someone who is not an Uchiha as they cannot deactivate the Dojutsu.
If the eye is exposed, you lose an amount of chakra points equal to two times the chakra points it would cost to activate the sharingan from the moment you expose it to every minute that passes there after. In order to keep the eye from draining your chakra constantly, you must cover it in some way, like with an eyepatch. You can also simply keep the eye closed, but in combat it is impossible to do so. Opening your eye requires no action, and removing a physical block requires an object interaction, but that means you do not require an action to activate the sharingan.
Any technique facilitated or involving the sharingan costs two times the amount of chakra that it normally would when used by a non-Uchiha.
Legal
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