Just as horse-sized beasts can be pressed into service as mounts, so can their monstrous cousins. Such monstrous cavalry are incredibly rare, as most such creatures are so strong-willed that great patience (or violence) is needed to break them to the point at which they can safely be used as a mount. This combination of mass and stubborn muscle makes regiments of monstrous cavalry a much-feared force upon the battlefields of the Warhammer world.
All the cavalry rules apply to monstrous cavalry, with two exceptions – monstrous cavalry always use the highest Toughness and Wounds characteristics the model has, rather than automatically using the rider's – indeed, this will normally mean that the model uses the mount's Toughness and Wounds characteristics.
Stomp!
Monstrous cavalry have the Stomp special rule.
Monstrous Ranks
A rank of monstrous cavalry needs only three models to count for rank bonus, steadfast and so on, and only need a six model frontage to count as a horde, as described under monstrous infantry (above).
Monstrous Support
Furthermore, the rider of a Monstrous Cavalry model can make as many supporting attacks as are on its profile, up to a maximum of three.