  Cauldron brewing is divided into phases.<~><~>  In phase 1, the /bIngredient Phase/z, one can add ingredients to the Cauldron by either dropping ingredients into
the top or by using the interface.<~><~>  Once you have mapped out your potion recipe and put the ingredients into the cauldron you can progress into the next phase 
by right-clicking the cauldron with a /bWand/z.<~><~>  Starting the brew this way draws upon your Mana. The cost is the sum of every ingredient's contribution: each Focal Ingredient adds 75 Mana, and each Potion Modifier adds 10 Mana.<~><~>  Provided you have enough Mana and the recipe is valid, the ingredients are drawn into the Cauldron and the brewing begins.