Undertow

You summon a rushing torrent of water 10 ft under a pint you can see within range. This torrent is 30ft long and 10ft wide, sweeping any material objects that aren't stone above it in the current. Creatyres standing abovebit must make a dexterit saving throw and take 6d8 bludgeoning damage, automatically lose concentration and begin to suffocate. Vehicles such as small boats and carts are rendered useless in the current. At the beginning of each turn, each creature in the water must make a strenth save or take 3d8 bludgeoning damage and is restrained until the emd of their turn. When this spell ends, all living creatures are shunted to the surface taking 2d10 force damage in the process. Any earth that is effected by this spell is now difficult terrain.