Aspect of Aliosos, Awakened

What was once thought of as an ancient magic spear, you now know to be an ancient magic trident. This light trident is made with a cerulean damascus patterned metal. Along the shaft are engraved reliefs of crashing waves, and oceanic clouds. Below a long flamberge-like blade is a wide curved guard, with slots carved into the top of each side. Magical weapons are known to be resistant to aging; this weapon is encrusted with barnacles and salt. As such, this weapon is beyond ancient. Now that you have used this weapon for a time, some of it's aging has reversed. The barnacles have fallen off, and some of the cerulean metal's sheen has returned. 

You have a +2 bonus to attack and damage rolls made with this magic weapon.

This weapon has 3 charges, that reset after a long rest.

After throwing this magic trident, you may expend 1 charge to teleport to the thrown location. Shunted through the plane of water, you appear at the target location in a splash of water, and catch the trident. In combat, you may substitute a thrown weapon attack to teleport behind the enemy and make a single melee attack. If the target is engaged with another creature, you gain advantage on this attack.

After spending time with this weapon, you have discovered some of it's secrets. You may empower this weapon with your arcane abilities. Using a bonus action, you may use a spell slot to imbue this magical trident with your spells, activating the two arcane blades out of the guard of the weapon. After doing so, the engravings along the shaft and guard alight with a teal energy, and two blades of water erupt from the slots in the guard. For 1 minute this weapon does an additional 1d4 cold damage per level of the spell slot expended to empower this weapon.

Proficiency with a Trident allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Bonus: Magic, Replace Damage Type: Slashing, Weapon Property: Finesse, by a Warlock, Damage, Combat, Thrown, Versatile, Topple