Mutual. Champion gets additional 3 levels against bloodborn race and immunity to psionic powers.

"Some say that nothing is scarier and more frightening than war. Others get excited by just the mere mention of a possible attack. They are living by the thrill and excitement of strategy and tactics, of bloodbath and gore. Fight fire with fire is the saying they are living with. This expression was probably born after the creation of Flaming Sword. This weapon is old as the universe, and it was proved to be a path to victory for many raising champions. The Flaming Sword will slay any enemy of yours, but its blade cuts exceptionally well the bloodborns flesh. It also will turn to ash anyone daring to use psionic powers. This sword is not just a weapon, it’s a true treasure, and an artifact proudly passed down from one generation to another."