Acerack eye

Properties of the Eye. Your alignment changes to neutral evil, and you gain the following benefits:

• Replaces the bearer's left eye with a golden eye with a slit for a pupil
• Grants d4 to all saving throws with exception to death saving throws, for every item of Vecna the individual has on their person this bonus shall increase by one die size, up to a maximum of d20, this bonus is interchangeable with advantage, but the effects do not stack.
• Grants Truesight out to a range of 120 ft.
• Grants the ability as an action to see as if you were wearing a Ring of X-ray Vision. You can end this effect as a bonus action.
• Additionally, it has an array of spell-like abilities that the bearer can trigger, although only 4 such spells can be cast per day, and all are cast with the proficiency bonus of a 20th level caster: Clairvoyance, Crown of Madness, Disintegrate, Dominate Monster & Eyebite. Each time you cast a spell from the eye, there is a 3 percent chance that Vecna tears your soul from your body, devours it, and then takes control of the body like a puppet. If that happens, you become an NPC under the DM's control.

All Vecna's Fragments have a Curse causing you to need to make a Save Vs. Wisdom (DC 20) once per month; failure causes you to be Charmed by Vecna for 4d4+4 hours. Additionally, a Fragment can be temporarily destroyed by any attack that inflicts at least 50 points of damage (except for the Heart), but only being eaten by someone using the Molar of Vecna can permanently destroy them.

To attune to the eye, you must gouge out your own eye and press the artifact into the empty socket. The eye grafts itself to your head and remains there until you die. If the eye is ever removed, you die.