Dungeons & Dragons 5e Element 133 Class Feature: Psychic Firewall

By installing a series of protective measures to your concousness you become immune to mind-influencing conditions, poisoned, unconcious (unless reduced to 0 hit points), paralyzed, stunned. You become resistant to poison and necrotic damage and cannot be put to sleep or become infected by disease. You also gain proficiency in Constitution saving throws (nonstackable).

Effects caused by hacking, programming, or nanotechnology, and any effect that requires a Constitution save that also works on objects have a slight chance of still affecting you. For an effect as above mentioned roll a d% on a roll of 10 or lower the effect affects you as normal.