In the tumult of battle, Beastmen are easily overcome by their primal urges, becoming frenzied with a bloodlust that can only be slaked with an excess of slaughter.
If, when testing to see if it becomes subject to Primal Fury (see page 116), this unit passes its Leadership test with any roll of a natural double, it will also become Frenzied. A unit with this special rule may become Frenzied in this way even if it has lost Frenzy earlier in the game.