Aquatic Trident

You summon a trident to your hand made of water you hurl it towards your target dealing 1d8 piercing damage. The target must make an STR saving throw (equal to your spell save DC) on a fail the target is pushed back 10 feet or none on a success. 

At Higher levels this spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).