Reaper Aasimar (5e Subrace)
From D&D Wiki
Reaper aasimar sit between their protector and scourage brethren; They protect what they can when called upon but reap the earth of those that act against the balance and work against the birth of life, in particular, undead.
Ability Score Increase. Your Constitution score increases by 1.
Necrotic Touch. You know the chill touch cantrip in addition to the light cantrip. Charisma is your spellcasting ability for it.
Reaper Weapon Knowledge. You have proficiency with the sickle, scythe, halberd, and glaive.
Mantle of Reaping. Starting at 3rd level, you can use your bonus action to unleash the divine energy within yourself, causing your eyes to turn dark and glossy and your weapon to be coated in a dreadful after image. Your transformation lasts for 1 minute or until you end it as a bonus action. During it, when you make an attack roll with a slashing weapon against a creature within 5 feet of another creature, that creature takes necrotic damage equal to your level. Once you use this trait, you can't use it again until you finish a long rest.