Echoing Lacerations

You emblazon 2 faint glowing runes into yourself for the duration of this spell. You can use a bonus action to expend any number of runes and send it at one creature or object within 120 feet of you. When you do so, make a ranged spell attack. On a hit, the target takes 4d6 slashing damage. Whether you hit or miss, the rune is expended. The spell ends early if you expend the last rune. For the duration of this spell you do not make any sound by moving.

If you cast this spell at 2nd level or higher: add an additional rune for each additional spell slot you expend