Beast Instinct

You obtain a 6th sense that causes your body to react instinctually to danger.

While you are conscious, you gain the following benefits:

•You can’t be surprised.
•Other creatures don’t gain advantage on attack rolls against you as a result of being unseen by you.
•Whenever you are blinded or deafened you can instead use this feature to replace that sense. 

Additionally, once per long rest, whenever you make a death saving throw you can add your Constitution modifier.