My suggestion will be without lore suggestions.
Physically full corruption will turn your crystal body in to a dead white wrinkled body.
So imagine your self as a beast of human blood (a vampire queen for example) that deceive the people with the innocent winter morning beauty but what truly is, hides beneath!
Playing pve full corruption with the sorcery gear (especially the hammer) you can challenge your self to defeat everything solo, trying to break the curse of corruption that binds you and eventually live eternal on this crystal body.
This however cannot remove your thirst for human blood, so in order to stay alive and continue your task every night a virgin or a lad (you choose
) must be sacrificed on your sacrificial table.
This way you’ll gain power to go to the next dungeon, vault, area, you choose, to slay everything or to do objectives you’ll point.
Your role play will end if you visit all the areas and achieve all the items every area has for rarity!
If you wish to take this idea further, or hints for a challenging start feel free to ask.