Like all other Beast weapons in Heroes; Caineghis's weapon has multiple facets to it. The first part is a simple Attack boost. In addition, when the foe attacks him, he gains +4 to all stats during combat. Finally; he possesses the armored beast transformation quirk of a further Attack +2 and Distant Counter.
Lion King Fang
Grants Atk+3. If foe initiates combat, grants Atk/Spd/Def/Res+4 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 unit can counterattack regardless of foe's range.