Aquatic Smite

The next time you hit a creature with a weapon attack before this spell ends, the weapon is covered in a holy water gleaming with watery light  as you strike. The attack deals an extra 3d6 cold and a 2d8 force  damage to the target. The target must make a strength save of be trapped in a water vortex.  on a fail the creature takes the paralyzed  condition for 1 minute or until a success. The creature can reroll the saving throw on there turn. 

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the extra damage increases by 1d6 for each slot level above 2nd and for every odd spell slot above 3rd level add an extra 1d8