Acid Shot2

Acid Shot. The cannon discharges acid in a line 300 feet long and 5 feet wide. Each creature in that line must make a DC 15 Dexterity saving throw, taking 22 (4d10) acid damage on a failed save, or half as much damage on a successful one. In addition, a creature that fails its saving throw takes 11 (2d10) acid damage at the start of each of its turns; a creature can end this damage by using its action to wash off the acid with a pint or more of water.