Pistomnite

You channel the fury of the Maelstrom Ocean into your blade, unleashing a crackling arc of lightning that mimics Captain Blackfin’s Stormfang. Make a melee spell attack against one creature within 5 feet. On a hit, the target takes 2d8 lightning damage and must succeed on a Strength saving throw (DC 8 + your proficiency bonus + your Charisma modifier) or be pushed 10 feet away. If the target is pushed into another creature, both take 1d6 thunder damage from the collision.