Mark of the Ruined King

You have been marked by dark forces and have gained an eerie and unnatural connection to death and decay. This connection grants you the following benefits:

Life Siphon: When you deal damage to a creature with a melee weapon attack, you can choose to siphon some of their life force. You regain hit points equal to half the damage dealt. This feature can be used a number of times per day equal to your Constitution modifier (minimum of 1).

Necrotic Strike: Your melee weapon attacks carry an aura of necrotic energy. When you hit a creature with a melee weapon attack, you can choose to add an additional 1d6 necrotic damage to the damage roll. This extra damage increases to 2d6 at 10th level and 3d6 at 16th level.

Unnatural Resilience: Your connection to death grants you resilience against necrotic damage. You have resistance to necrotic damage, and you have advantage on saving throws against being frightened.

Mark of the Ruined King's Sight: You can see in magical darkness as if it were dim light. Additionally, you can see the life force of creatures as an eerie, spectral aura. This allows you to see invisible creatures within 30 feet of you.