Trident of the Oljatt Sea

This magic weapon is rumored to be a weapon of sahuagin fighters. You gain a +2 bonus to your attack and damage rolls made with this magic weapon. As a Magic Action, you can unleash a jet of steam that forms a Line 60-foot-long and 10-foot-wide originating from the trident. Each creature in the Line makes a DC 17 Dexterity saving throw, taking 6d8 Force damage on a failed save, or half as much damage on a successful one. Once you use this property, you can't use it again until you finish a Long Rest.

Proficiency: simple, trident Source: Treasures from Oerth p. 28 (Homebrew)