Bow of Antilay:

The wielder increases their attack range by 1. Once per battle, may increase the range of one attack by 2 instead. If the empowered attack from this artifact were to kill a unit, the ruler unit regains a quarter of their max HP, rounded up. The unit that wields this artifact automatically counts as ranged. "Arkrax took everything from me, this is my chance to attempt once more to enact my vengeance. I refuse to miss."