Unless taken as a mount for a Hunter, a Stonehorn or Thundertusk and its Ogre Beast Rider have their own characteristics, but are treated as a single model. If the Stonehorn is removed as a casualty, then the Ogre Beast Rider is removed along with it. When moving, the model always uses the Movement characteristic of the Stonehorn or Thundertusk. The Stonehorn or Thundertusk and Ogre Beast Rider use their own Weapon Skill, Strength, Initiative and Attacks characteristics when they attack. Each can attack any opponent that the model is in base contact with. Ogre Beast Riders use their own Ballistic Skill when making shooting attacks. All hits upon the model are resolved using the Stonehorn or Thundertusk’s Toughness and Wounds. In close combat, enemy models attacking the model compare their Weapon Skill to the Stonehorn’s Weapon Skill when rolling To Hit. However, we assume the Ogre Beast Rider to be in complete control of the monster, so the Stonehorn or Thundertusk’s Leadership is never used. A Stonehorn is treated as a monster in all other respects, as described in the Warhammer rulebook.