Sylvanyx's Gentle Blade

‘Violence is only ever the answer at the very end of need, as the most final of resorts. That does not mean you should be caught unprepared'

You weave together light to create shimmering, translucent claws or a blade. You are proficient with this weapon, and it uses your spellcasting modifier and spell attack for its damage and attack rolls. The weapon deals 2d6 radiant damage, and creatures attacked by this weapon have disadvantage on stealth checks and cannot become invisible until the end of their next turn. If this spell reduces a creature to 0 hit points, the creature stabilises and is knocked unconscious. 

At Higher Levels. When you cast this spell using a 5th- or 6th-level spell slot, the damage increases to 3d6. When you cast it using a 7th- or 8th-level spell slot, the damage increases to 4d6 and the weapons reach increases by 10 feet. When you cast it using a 9th level spell slot, the damage increases to 5d6 and the radiant damage ignores resistance and immunity.