Like all other Beast weapons in Heroes; Ranulf's weapon has multiple facets to it. The first part is a simple Defense boost. On top of that, as long as he is within 2 spaces of an ally, the Covert Cat Fang provides Ranulf and all allies within 2 spaces a boost to their Attack and Defense by 3 during combat. Finally, as with all cavalry beast units, Ranulf gains Atk +2 and the combat initiation bonus of Atk/Def -4 on his opponent and blocks their follow-up attack.
Covert Cat Fang
Grants Def+3. If unit is within 2 spaces of an ally, grants Atk/Def+3 to unit and allies within 2 spaces during combat. At start of turn, if unit is adjacent to only beast or dragon allies or if unit is not adjacent to any ally, unit transforms (otherwise, unit reverts). If unit transforms, grants Atk+2, and if unit initiates combat, inflicts Atk/Def-4 on foe during combat and foe cannot make a follow-up attack.