Oath of Vainglorious Purpose

As a result of your oath of Vainglorious Purpose to Liira, you gain proficiency in wisdom saving throws.

Additionally, you gain the ability to enter a state of Egomania

Egomania. Using a bonus action you can expend a spell slot to enter Egomania for a number of turns equal to twice the level of the spell slot or until you end a turn without being attacked, making an attack, making a saving throw, or forcing a saving throw.

When you enter Egomania, spectral images of yourself appear around you. You determine what they look like, how they're positioned, etc.

While in a state of Egomania you cannot cast spells. You also have advantage against being charmed and frightened. If you are charmed or [/condition]frightened[/condition] before you enter a stae of Egomania, and the condition doesn't prevent you from entering a state of Egomania. You are no long charmed and/or frightened.

While in Egomania, one target you hit with an attack, or force to make a saving throw, becomes so obsessed with you that it has disadvantage on any attack roll that isn’t against you, and when the target hits a creature other than you with an attack, that creature has resistance to the damage dealt by the attack. The effect on the target ends early if your Egomania ends.