If, at the beginning of its Movement phase, a Slaughterbrute's master has been slain (or if it started the game without a master), it is Unbound. An Unbound Slaughterbrute has the Random Movement (2D6) and Frenzy special rules. An Unbound Slaughterbrute can never lose its Frenzy, even if beaten in close combat. In addition, an Unbound Slaughterbrute cannot choose the direction it travels in. Instead, roll a scatter dice in the Compulsory Moves sub-phase and move the Unbound Slaughterbrute in the direction rolled (if a 'Hit!' is rolled, the Slaughterbrute moves straight forwards). If an Unbound Slaughterbrute moves into contact with the board edge, a building or impassable terrain, it instead stops 1" away.

Unlike other random movement, an Unbound Slaughterbrute can move into base contact with a friendly unit, in which case it will come to a stop and immediately inflict D6+2 Strength 7 hits on the unit. (If it comes into base contact with more than one unit, you must choose one to inflict hits on.) After resolving these hits, move the Slaughterbrute directly backwards 1", so that it is no longer in base contact with the unit.