Explanation of the formula:
elixir of the serpentine XI = increase cap by 22, increase stat by 38. 80 minutes
elixir of the serpentine XII = increase cap by 25, increase stat by 41. 80 minutes
elixir of the serpentine XIII = increase cap by 28, increase stat by 44. 80 minutes
Not sure of the previous versions, will all info later.