Blade of Grass

You imbue one or two blades of grass with nature's power. For the duration, they become sicles, and you can use your spellcasting ability instead of STR for attack and damage rolls. They are considered magic weapons. If you let go of a sickle created by this spell, the spell ends and it reverts to a nonmagical blade of grass. The spell also ends if you cast it again. 

At Higher Levels. At 5th level, the melee attack deals an extra 1d4 slashing damage to the target on a hit. Damage rolls increase by 1d4 at 11th level (3d4) and again at 17th level (4d4)