Astra

You imbue a weapon you touch with starlight. Until the spell ends, the weapon emits bright light in a 30-foot radius and dim light for an additional 30 feet.
In addition,  it doubles number of attacks character, wieldieng imbued weapon, normally has available as an Attack action, but halves the damage caused by the attacks.
(f.e. if a character normally has one attack as Attack action that deals 2d6+3 dmg,  instead it has two attacks that deal (2d6+3)/2 dmg).
If the weapon isn't already a magic weapon, it becomes one for the duration.

As a bonus action on your turn, you can dismiss this spell and cause the weapon to emit a burst of starlight radiance. Each creature of your choice that you can see within 30 feet of the weapon must make a Constitution saving throw. On a failed save, a creature has disadvantage on next attack roll/saving throw it makes.