A single Screaming Bell can be deployed in each unit of Clanrats or Stormvermin. Place the Screaming Bell at the front of its unit, as centrally as possible. Accordingly, the following rules apply.

Moving the Screaming Bell

The unit the Screaming Bell has joined marches, charges, and pursues normally so long as it has at least 10 models. For every model the unit drops below 10, the unit deducts 1" from its move. So, if there were nine Skaven in the unit, they would have a Movement of 4, eight would have a Movement of 3, (etc.). If the unit is reduced to five or less models, it cannot move.

Difficult Terrain and Obstacles

If the Screaming Bell (not the unit pushing it) passes over difficult or very difficult terrain or an obstacle then it suffers D6 S6 hits. This includes charging a foe that is behind a defended obstacle or in a building. Apply these hits immediately, with all hits allocated to the Screaming Bell (not any character mounted atop it). If the Screaming Bell is not destroyed it may continue its move and will not suffer any additional hits for crossing other obstacles during the same phase. The Screaming Bell (and its unit) can assault a building, but cannot enter it unless a scenario states otherwise.

Shooting at the Screaming Bell

An enemy can choose to target either the unit pushing the Screaming Bell or the Screaming Bell itself. Hits against the unit are as resolved as normal, but hits against the Screaming Bell are randomised - hitting the Screaming Bell on 1-5, and the Grey Seer on a 6.

The Screaming Bell in Combat

The Screaming Bell does D6 Impact Hits when it charges. The Rat Ogre crew and Grey Seer may fight anyone in base contact with the Bell. The Rat Ogre can fight close combat and still ring the Screaming Bell. Enemy models in base contact can choose to attack the Screaming Bell or any character mounted on it. Attacks against the Screaming Bell must roll To Hit against the Rat Ogre crew's Weapon Skill.

The different sized base of the Screaming Bell means some extrapolation must be done to work out the rank bonus. Count the model as the same number of Skaven that would normally occupy that space (usually 15).

Destroying the Bell

If the Screaming Bell itself is destroyed, remove the model and place the Grey Seer where it was. He will join the unit. This is the only way the Grey Seer can leave the Screaming Bell.