Six Eyes

A Six Eyes bearer has immense perception and unrivaled visual prowess far beyond that of any other person. Their eyesight is comparable to high-definition infrared camera, allowing them to see even when their eyes are covered. They can easily see things from several kilometers away and distinctly tell apart different figures within that range
Your Eyes can see the Flow Of Mana and Cursed Energy
Your Eyes can see other People's Powers/Stats/Innate Cursed Techniques
Your Eyes can find Weak Points
Your Eyes can read enchantments
The Six Eyes has a 50% Cursed Energy Cost Reduction [80% When you are Max-Level]
Six Eyes gives the User a GREAT level of Control over their own Cursed Energy [Which also reduces the chance of landing a Black Flash STUPIDLY]
You auto-pass almost all perception checks unless it's challenged by the DM then you roll roll advantage [4X]
Truesight
Information Overload: Due to the amount of information your eyes capture, if you're not wearing any light object to protect your eyes, you will receive 1 level of exhaustion every minute. Additionally, for every exhaustion level you gain like this. If you wear eye protection again, this timer resets after a minute of covering your eyes rather than immediately. Finally, if you have the Improved Reverse Cursed Technique feat, you can remove these exhaustion levels for every 50 hit points you heal with it.
The Main Perk of Six Eyes = Your Eyes can read the info about anyone's/anything
Amazing Student, Terrible Teacher: You have disadvantage in any rolls related to teach something to a creature, while on the other hand you have advantage in any rolls related to learning something.
Grants VERY Little Mental Resistance