God Blooded (Vecna) MMV pg66
God blooded is an interesting template in that it is acquirable, and lose-able. So it is possible to gain the template (and its +1 LA) then subsequently lose it dropping your ECL.
Most of the abilities are fairly pointless; except for one.
Special Qualities: A Vecna-blooded creature gains the following special qualities.
Cloak of Mystery (Su): All knowledge of the Vecna-blooded creature fades from the world. Its original name, its deeds before becoming Vecna-blooded, and so forth, disappear from memory. Only Vecna and the Vecna-blooded creature retain this knowledge.
A Vecna-blooded creature gains immunity to all divination spells cast against it or cast to learn information about it. Such divination fails to reveal any information. The Vecnablooded creature immediately learns the name, appearance, and location of the caster who attempted the divination.
Unlike other god-blooded abilities, the Vecna-blooded creature retains this special quality after it loses other abilities from this template.
Check out the last line of that ability, then go look at the ability itself.
Yes you now look ugly as hell
The creature loses all distinguishing characteristics, hair, and other traits, keeping only a small, thin mouth, the faintest trace of a nose, and eyes. These changes are permanent and remain even after the creature loses this template.
But your charisma stays the same, and you are unscannable with no backstory or past but the one in your head.
basically all for free. Start with the template, use up the DR to remove the template, then let the exp river carry you forward.