Puddingbane is a nickname for a -3 small weapon (normally a dagger, orcish dagger, or knife). Any damage roll of 1 after enchantment will not add strength, so with a -3 (or more) dagger or knife, it doesn't matter how high strength is, the damage will still always be 1. Corroding is optional. It is used to split puddings for pudding farming while doing the minimum possible damage, it can kill them, just will split them a lot first. Another use is to help maintain pacifist conduct.