Boon of Darkness

Epic Boon Feat (Prerequisite: Level 3+)

You gain the following benefits.

.Darkest Blade. When one of your team members is on the brink of death you can use some of your (1d8) hp to use this attack (2d8) plus modifier.

Shadowy Resistance. While within darkness or very dim light you don't take any damage except Radiant, Psychic and Thunder.

Shadowy Revolt. When the user is hit while in shadows by light or Radiant damage, enemy takes (1d8 )necrotic damage and becomes prone. 

Into the Shadows. While within Dim Light or Darkness, you can give yourself the Invisible condition as a Bonus Action. The condition ends on you immediately after you take an action, a Bonus Action, or a Reaction.