"The boon that the hero receives is the knowledge of the Indestructible Body, often represented in myths as food, drink, or fire with magical powers or that’s never finished and always renews itself."
The boon is simply a reference to the in/tangible gifts pulled out of the New World as a result of journey through it.
More info / buy the 2000+ stage Hero's Journey And Transformation Through A New World / State at http://www.clickok.co.uk/index4.html or http://www.kalbashir.com