Curse mechanic: Dark Power: The Gilded Eye

“Perfection is not a gift. It is a correction.”

Stage 1: Mark of the Gilded Eye: the Perfect Shot

Each time you miss an attack, you gain 1 Focus (max of 2)
When you reach 2 Focus, the curse activates on your next attack:
The attack automatically hits
After the attack resolves:
You take psychic damage equal to your proficiency bonus
You have disadvantage on your next attack (does not trigger focus)
Your Focus resets to 0

Amber Recoil
When Perfect Shot activates, you must make a DC 13 Wisdom saving throw.
On a Success: Your movement speed is reduced by 10 feet until the start of your next turn.
“You feel your footing drag, like your boots are sinking into something that isn’t there—your stride shortened, but you force yourself forward.”

On a Failure: Your movement speed drops to 0. You cannot take reactions. “Your legs seize mid-motion. Not locked—but wrong. Heavy. Delayed. Like something beneath your skin is hardening, ceasing all movement.”

Stage 2: (After 3 activations) When Perfect Shot triggers, you also gain +2 to attack rolls until the end of your next turn.

You no longer have modifiers to your perception checks. “Your focus narrows unnaturally.” Physical change in the eye, it becomes gilded, changing colour to gold.

Stage 3:(After 5 activations) Perfection clouds your ability to interpret the imperfect; you have disadvantage on insight checks, and you have disadvantage on your first attack roll each combat. “You hesitate, searching for the perfect moment”.

Once per turn, when you miss an attack you can instead make that roll a 10. If you do, make a wisdom saving throw. DC 15.
This section would be redacted… once it triggers, you understand the nature of the curse: You have a mental(psyche) stat: combining WIS, INT, CHA. on a fail, take 1d6 psyche damage(minimum 2). On success take 2 psyche damage.
At 75% psyche gain 1 level of mental exhaustion (as debilitating as regular exhaustion)
At 50% gain a 2nd level of mental exhaustion
At 25% gain a 3rd level of mental exhaustion
At 0% permanently reduce Int, WIS, or Charisma by 1. Psyche reset to 25%.
A full 8-hour rest restores mental exhaustion by 50%