The Final potion is a potion that appears to the weak and grieved. It gives the user almost complete invulnerability, with the downside of the user being split into two entities, connected and thinking similar thoughts. As time goes on, the mind set of the entities grows apart, but they can never seperate. If they do, they die pretty quick.
Upon taking this potion the user gains the abiltity to morph into what ever shape they have already been. For example, putting on the Taco Amulet then taking it off again allows for the user to now morph between either form whenever they choose.
The only known person to have ingested this potion is Alchemist Endrew.