Fever-Bit 2014
Subrace of Drow.
You were once a typical drow, then you fell victim to the ravaging claws and teeth of a darakhul. The deadly darakhul fever almost took your life, but, when you were on the verge of succumbing, you rallied and survived. You were changed, however, in ways that even the greatest healers of your people can't fathom. But now that you are immune to darakhul fever, your commanders have a job for you.
Traits
Ability Score Increase
Your Constitution score increases by 1.
Deathly Resilience
Your long exposure to the life-sapping energies of darakhul fever has made you more resilient. You have resistance to necrotic damage, and advantage on death saving throws.
Iron Constitution
You are immune to disease.
Near-Death Experience
Your brush with death has made you more stalwart in the face of danger. You have advantage on saving throws against being frightened.
Source: Tome of Heroes (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details