Cyfar's Frozen Crystals

You create three, one foot-long stakes of ice in your space. They float in the air in front of you for the spell's duration. When you cast this spell, and as a bonus action on each of your turns thereafter, you can expend one or two of the ice stakes, sending them flying towards a target or targets you choose within 60 feet. On a hit, a target takes 2d8 piercing damage, followed by 1d10 cold damage.

If the piercing damage is sufficient to reduce a target to 0 hit points, the stake of ice penetrates through the target and continues on its trajectory until it reaches the end of its range or strikes a secondary target. If the ice stake would strike a creature as a secondary target, the creature must succeed on a Dexterity saving throw or be hit by the frozen projectile, suffering piercing damage equal to 1d6 + any excess piercing damage carried over from the initial target, and 1d10 cold damage.

While the spell is active, you may use an action on each of your turns to expend one ounce of water or ice and conjure one new stake of ice. You can maintain a maximum number of ice stakes equal to your spell casting modifier + 3 (minimum 3) at one time.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the initial number of ice stakes created, and the maximum number of ice stakes you can maintain both increase by one for each spell slot level above 3rd.