Third eye

Many across the realms are blessed with the gift of foresight. sadly, many of them never fully learn to harness the power of this blessing, they see these strange visions as nothing more the deja' vu. Some will however, come to understand these subtle glimpses for what they are, and learn to harness them.
To a fighter only a fraction of a second is all that stands between victory and death. A peek into the future by even a moment can sway the outcome of a fight, so to those who have come to wield the foresight are formidable indeed.  those who have studied and practiced in this strange phenomena have called it the third eye, and those few that have come to master it have become legend.

Sight

Starting at third level you gain the ability to focus your foresight to gain an edge in the world around you. This ability is represented by Sight points and you gain a number of sight points equal to your WIS modifier (min 1) 
These points can be spent to use different vision abilities (listed below) and are regained after a short or long rest.

You gain three Visions at level 3.
2 additional visions are gained at levels 7 and 10
Additionally when a third eye user scores a critical hit in combat they can choose to recover a spent sight point instead of dealing critical damage.

Vision of Blood

You may spend 1 sight point to cause a creature to make its next attack against you with disadvantage. 

Vision of Conflict

Spend 1 sight point to gain advantage on an initiative roll or to warn your party of a surprise attack negating any surprised effects.

Vision of Cooperation

You may use your reaction and choose an ally you can see, then use a vision that will effect the chosen ally instead of you.

Vision of Danger

You may spend 1 Sight point to gain advantage on a Dexterity saving throw.

Vision of Darkness

You may spend 1 sight point to negate the effects of Blindness for a number of rounds equal to your Wisdom modifier.

Vision of Guidance

you may spend 1 sight point to add your wisdom modifier (min1)  to a skill check.

Vision of steel

When a creature misses an attack made against you, you may spend 1 sight point and use your reaction to make a melee  attack against the creature.

Vision of Weakness

you may spend 1 sight point to add your wisdom modifier (min1) + proficiency to damage of an attack roll. this damage is equal to the type of damage of the weapon used to make the attack.

Omen

Starting at 7th level after a long rest you may roll a d20 and set it aside as your omen die.
After any roll you may spend 1 sight point to replace your current omen die with the resulting die of the roll. 
The replaced die becomes your new omen die.

Focused Sight

Starting at level 10 you may double your wisdom modifier for use with your third eye abilities, and for calculating your sight points.

Third eye's gaze

Starting at 15th level you may spend 2 sight points as an action to cast one of the following Divination spells:

True Seeing
Detect thoughts
Scrying

spells with a duration last a number of rounds equal to your Wisdom modifier (min1)

Third eye open

Starting at 18th level you may, as a bonus action, activate your third eye for 1 minute.
During this time you have advantage on all skill rolls, combat rolls, saves, and ability checks.
Additionally all attacks made against you have disadvantage. This ability can only be used once and is regained after a long rest.