Naught but a memory...

The world has been unkind to you, what remains is but a figment of what formerly stood, or perhaps a sliver that keeps you from being whole. You are immune to all effects that seek to detect, scry, or locate you in any way; those attempting to remember anything but a name or face of you have disadvantage (history), and you gain expertise in stealth if you don't already have it. You bear a sense of being unwhole, a missing memory(/ies), an inability to feel a specific emotion, potentially even just the illusion that you cannot be satiated or satisfied; even if they remember you it won't be for what you have done, can't blame them since you hardly can either...