Trident of water

As an action, you can summon a trident of clear water within your hand similar to a pact weapon.  You may use a bonus action after summoning it to throw the trident at a target.  The trident dissipates  after dealing damage to its target. Trident deals 1d10 piercing damage.

A 1d10 is added at lvl 6 and another 1d10 at lvl 10 and a final 1d10 at lvl 15.