The Potion of Illusion is one very fun item to play around with.
Target a person, drink the potion and you will transform into that person!
Potion of Illusion is made by alchemists who learn the recipe from their Alchemy trainers. Alchemists must have level 460 alchemy to learn it.
Anyone can use the potion though, well as long as your level 80.
If you don’t know an alchemist try looking on the auction house for some.
I decided to use the potion on my hubby, 2 toons walking around looking like him though may be too much