RWBY World of Remnant Season 1 Episode 4 Aura Episode Title:Aura.Episode Description:The narrator explains Huntsmen are considered Remnant's greatest warriors in large part by mastering Aura; a manifestation of the life force or soul that runs through every living being - save Grimm - but which only true warriors can amplify and control. It is primarily used for defense, sheathing the wielder in a protective force field to help survive otherwise fatal blows - though their reserves deplete with each hit until exhausted, leaving them vulnerable. Aura's second main use is by projecting it into a more tangible form known as a Semblance, providing a special power unique to each wielder such as superhuman strength or telekinesis. The narrator claims that, with enough training and focus, Aura can turn a warrior into far more than a simple man or woman.