Yamato

Evocation Casting Time: 1 action Range: 30 feet (line) Components: V, S, M (a shard of ice) Duration: Instantaneous You slash your weapon, sending forth a blade of freezing wind in a 30-foot line. Creatures in the line must make a Constitution saving throw or take 6d8 cold damage and have their speed reduced to 0 until the end of their next turn. On a successful save, they take half damage and no speed reduction.