If foe initiates combat and uses sword, lance, or axe, grants Def+7 during combat.
Vidofnir can be upgraded in the Weapon Refinery. When upgraded, the description of Vidofnir becomes "If foe initiates combat and uses sword, lance, axe, dragonstone, or beast damage, grants Def/Res+7 during combat.". Vidofnir can be upgraded with the additional effect "If unit is within 2 spaces of an infantry or armored ally, grants Atk/Spd+4 during combat.".