Ice Crystal Blade

You create an ice crystal in your hands that grows magically and is hurled at a target within range of the spell. Make a ranged spell attack. If it hits, the target takes 3d6 cold damage and 3d6 slashing damage, and the crystal splits into two more crystals that fly toward two targets of your choice within 15 feet of your original target. Your original target can also be struck by these crystals.

The new targets must make a Dexterity saving throw. On a failure, they take the same damage. Targets that have taken damage this way can’t make more than one attack per turn, can’t take the Disengage or Dash actions, and can’t use bonus actions until the start of their next turn.

At Higher Levels. When you cast this spell by spending Mana points equal to a 5th-level spell or higher, the cold or slashing damage increases by 1d6 for each spell level above 4th. When cast as a 5th-level spell or higher, this spell’s damage becomes magical.