Alinac's Javelins of Frost

You create two javelins of ice and hurl one at a target within range. On a hit, the target takes 3d6 cold damage.

On each subsequent turn as a bonus action you may launch another javelin.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you create one additional javelin for each slot level above 2nd.