Mariner’s Blight

You strike at the heart of a humanoid you can see within range, filling them with the vile shudders of sea sickness. The target must make a Constitution saving throw, on a failed save they become poisoned. If they attempt to move more than 20-foot while affected by the spell they must make a Dexterity saving throw, falling prone on a failure, the target has disadvantage on this save if they are on water or a floating vessel. The target may make a Constitution saving throw at the end of each of its turns, ending the spell on a success.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you may target one additional creature for each slot level above 2nd.