Celestial Edge

You infuse a martial weapon you touch with the ancient power of starlight, wrapping it in a luminous aura that resembles the night sky. For the duration, the weapon emits bright light for 15 feet and dim light for an additional 15 feet, and it deals an extra 2d6 radiant damage to any target it hits. Furthermore, any attack made with the weapon that critically hits causes bursts of starlight that dazzle the target, imposing disadvantage on their next attack roll before the end of their next turn.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the weapon deals an additional 1d6 radiant damage for each slot level above 2nd.