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Runesword

weapon (any sword), very rare (requires attunement by a spellcaster)

This magic sword has a blade of gleaming steel, inscribed with arcane runes that glow with a faint blue light. The hilt is wrapped in black leather and adorned with a silver pommel.

Arcane Weapon

The sword grants a +2 bonus to attack and damage rolls made with it, as well as to spell attack rolls.

Arcane Recharge

When you score a critical hit with this weapon, you regain one expended spell slot of the highest level you have cast, up to a maximum of 4th level. This ability can be triggered only once per turn.

Arcane Smite

When you hit a creature with this weapon, you can expend one spell slot to deal an extra force damage to the target per level of the spell slot.

Create printable cards for Runesword

Credits

Thanks to NerdQueenAlice for pointing out that Arcane Recharge could be abused against paralyzed enemies. The feature has been updated so it only works once per turn.

Lore

In the heart of a bustling town, there existed a sanctuary of craftsmanship and magic known as The Steel Song. At its helm was Lira, a blacksmith whose skill and passion were as legendary as the tales spun within her workshop. The rhythmic clinking of hammers and the enchanting melodies of her voice echoed through the air, giving birth to extraordinary creations.

Lira's unique gift lay in her voice, a force capable of coaxing metal into breathtaking forms. Rumors whispered of her vocal prowess, likening it to a dragon's roar and a soothing lullaby. Each metal in her forge danced to a different tune, as ancient melodies and original compositions wove enchantments into the very essence of the materials.
One such masterpiece that emerged from The Steel Song was the Runesword — a blade of gleaming steel adorned with arcane runes that emitted a faint, ethereal glow. The hilt, wrapped in black leather and crowned with a silver pommel, held a connection not just to the physicality of the weapon but also to the magic infused within.
The creation of the Runesword was a symphony of art, music, and magic. Lira's hands, skilled and sure, guided the forging process as her voice resonated in harmony with the steel. The resulting weapon was a testament to her mastery, a manifestation of her deep understanding of both metal and magic. Wielders of the Runesword felt the pulse of magic coursing through them. The blade itself became an extension of the bearer, empowering their strikes and spellcasting alike.
Beyond the enchantments, The Steel Song was not just a workshop; it was a haven of art and magic. Lira, a friendly and outgoing soul, engaged in lively conversations with her customers, sharing stories and insights about the history, culture, and lore of metalworking. Her loyal clientele, including adventurers, soldiers, merchants, and nobles, found not just a blacksmith but a true artisan and friend in her.
Echo, Lira's pet raven, added an ethereal touch to the workshop by mimicking her songs and speech. The forge's atmosphere was vibrant, fueled by the camaraderie between Lira and her allies—a bard, a guard captain, and a mage. The Steel Song was more than a place to acquire weapons; it was where every creation resonated with a symphony of craftsmanship, magic, and the passion that Lira poured into her work.