Carpetbagger was used by Southerners as a pejorative term, referring to the carpet bags (a form of cheap luggage made from carpet fabric) which many of these newcomers carried. The term came to be associated with opportunism and exploitation by outsiders.
The Wolfsbane Potion is an innovative and complex potion that relieves, but does not cure, the symptoms of lycanthropy. The main ingredient is wolfsbane (also referred to as aconite or monkshood). As such, this Potion is very dangerous when incorrectly concocted, since Aconite is a very poisonous substance.
The potion does not cure lycanthropy but eases the symptoms, allowing one to hold on to their mental faculties after transformation (which would otherwise not be possible). It renders the dangerous beast into an ordinary, sleepy wolf.