Auroth's Frigid Halting

You cause thick ice to form on one creature that you can see within range. The target must make a Constitution saving throw, taking 2d6 cold damage, or half as much on a successful save. If a creature fails this saving throw its speed is reduced to 0 for the duration and it cannot benefit from any bonus to its speed.

A target affected by this spell takes 1d6 cold damage at the end of each of its turns and can repeat the saving throw, ending the effect on a success.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage taken by an affected creature increases by 1d6 for each slot level above 1st.