Method: translate. The bearer must behave as their stage prescribes until the power becomes part of them. Until the potion is digested, the bearer is vulnerable: the power is already there, but there is no control over it yet.
Path roles are functional: the Archaeologist understands what is found, the Craftsman works with their hands, the Alchemist transforms one thing into another and is responsible for the result.
The method long remained the knowledge of the few: church hierarchies were in no hurry to reveal it, and many otherworldly beings rose blindly, paying for it with their sanity.