Tidal Surge

You channel the power of the ocean, transforming a 60-foot cone in front of you into a rushing tidal wave. Each creature in the line must make a Strength saving throw. On a failed save, a creature takes 8d8 bludgeoning damage, is pushed back 10 feet, and is knocked prone. On a successful save, the creature takes half damage and isn't knocked prone or pushed back.

Additionally, any non-magical flames within the area of the tidal surge are extinguished, and the ground becomes slick and difficult terrain for 1 minute.

At Higher Levels. When you cast this spell using a spell slot of 7th level or higher, the damage increases by 1d8 for each slot level above 6th.