Tideburst

You propel a high-velocity jet at a creature or object within range. Make a ranged spell attack against the target. On a hit, the target takes 1d8 Piercing damage.

Any unprotected flames hit by this spell is extinguished. Against creatures vulnerable to Cold damage, Piercing resistance is ignored and you roll damage with advantage. 

This spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).