As Ascended beings, the Ori do not interfere directly in the mortal plane. They use instead humans called Priors, which they artificially evolve so that they are one step from Ascension, giving the Priors godlike powers. Because the Ori have worshipers across the entire home galaxy of the Ancients, and use their knowledge to spread, they are nearly unstoppable. For example: Ori warships, built using conventional means while operated through the supernatural abilities of the Priors, are generally considered to be the most powerful vessels in the Stargate universe.