Nightborn

Very few manage to witness the embrace of a higher being...

You are not like the very few. Managing to gain the blessing from a celestial individual. Whether it was due to mere kindness, or perhaps... at a cost, regardless, you are able to tap into a fraction of powers to do the following when you take this feat:

•  You gain necrotic Resistance.
• Three times per long rest you can use a bonus action to impose disadvantage on all attack rolls made against you, as if you were under the effects of the blur spell until the start of your next turn.