Chains of Containment

Chains are conjured from the outer plains shooting from the casters outstretched hand in a 30 foot line. Creatures in the line that are a large or smaller creature must succeed on a strength saving throw, creatures immune to being restrained such as an air elemental are immune to the effect. On a failed saving throw the target takes 4d6 bludgeoning damage and is restrained. On a success the target halves the damage and ends the effect. You can take an action to inflict the 4d6 damage each turn. The target can use its action to attempt the saving through each turn.

Casting at higher levels: When cast at a higher level: For each spell slot about 3rd level deal 1d6 more damage.