By drinking this essence you can gain potentially any and all superpowers, skills, forms, magic, psychic power, etc.
*A well of infinite power exists within you that through training can do anything.
*You start with only being able to make metaphorical sparks happen with your power but with constant use draw on larger and larger amounts.
*Depending on how your trying to train a power it may directly enhance you, generate an effect or be turned into another power source which does them.
Example: Using the well to breathe fire vs. Using the well to make magic capable of making a fire breathing spell.
*For clarification: the power well can act as any power or power source you want. Or be turned into any power or power source you want, without removing the well.
*Yes this does mean you can have a pool of magic along with the well, but remember at that point you will need to train both of them.
*The power or powers created by fiat can not be stolen, copied, destroyed, or mimicked in any way against you will.