The Sangue Rosso is a potion that is one of Herobrine's strongest weapons from outkookdrive's The Wielder Chronicles. It is used by him to turn people into immortal Wielders (servants) that obey only him. The potion will let the Wielder live forever, and give them heightened powers. The Sangue Rosso appears in the Wielder Chronicles, as Nya is forced to drink it. Later, it is used on Clare.
The Sangue Rosso is blood red, much like a harming potion. It is kept in a glass bottle in Book 1, carried around by Steve/Herobrine. In Book 2, it appears in a university potions class phial.