Acid Cloud

You conjure a cloud of acidic vapour over the head of one creature that you can see within range. The cloud follows the target as it moves and sprays acid upon it periodically. The cloud lasts for the duration or until strong wind (such as the one created by Gust of Wind) disperses it, ending the spell.

At the start of each of the target's turns while the cloud lasts, the target and each other creature in its space must succeed on a Dexterity saving throw or take 5d4 acid damage.

Using a Higher-Level Spell Slot. The damage increases by 1d4 for each spell slot level above 5.