Turbulent Aether (mega)

Choose a wildjammer you can see within range. The target wildjammer's Helmsman must make a Dexterity saving throw. On a failed save, the wildjammer's speed is halved for the duration. the target wildjammers Helmsman can repeat this save at the end of each of their turns, ending the effect on a success.

At Higher Levels.  When you cast this spell using a spell slot of 2nd level or higher, you can target one additional wildjammer or mega creature for each spell level above 1st.