Elfblade

This enchantment can be found on any weapon that deals slashing damage and is not multi-use.

While attuned to this blade, you gain +1 to damage and attack rolls and ignore resistances to slashing damage. This weapon glows blue, emanating dim light within 5 feet, when there are evil-aligned creatures within half a mile. In addition, a weapon with this quality can be used as a magical focus for ranged spells, imparting the +1 modifier.