Thunderboom

As an action, you can spend 3 charges to have the trident send out a thunderous wave of sound in a direction of your choice. Each creature in the shockwave's 30-foot-long and 5-foot-wide line must make a DC 13 Constitution saving throw. On a failed save each creature takes 2d8 thunder damage and is deafened and silenced until the start of your next turn. On a success they take half damage and are not deafened or silenced.