Boon of the Specter

Epic Boon Feat (Prerequisite: Level 19+)

You gain the following benefits.

Ability Score Increase. Increase one ability score of your choice by 1, to a maximum of 30.

Spectral Form. As a Bonus Action, you can become spectral for 1 minute. While in this state, you can move through creatures and objects as if they were Difficult Terrain. If the effect ends while you are inside an object, you are transported to the nearest unoccupied space and take 1d10 Force damage for every 5 feet moved. You can use this feature a number of times equal to 1 + your Proficiency bonus, regaining all expended uses when you finish a or Long Rest.

Spectral Vision. You can see through solid objects within 30 feet. Within this range, you perceive objects as spectral, transparent images.