Water Breathing: Water Surface Slash

The user takes a deep breath, and channels energy into their weapon, and then swings; their blade is covered in water, and rips through the target, allowing for improved range over a standard melee attack, and dealing extra damage. Make a melee weapon attack, on a hit, the target takes 2d12 force damage, and a further 1d12 slashing damage. 

Higher level: When you cast this spell at 2nd level or higher, you deal an additional 1d12 slashing damage for each level above 1st.