Cloud of Insects

You conjure swarm of insects by eating an insect opening your mouth wide.  The insects flow from your mouth to a point within range making a 5-foot Cube. Each creature in that area takes 4d4 Piercing damage. A creature also takes this damage if it enters the Cube or ends its turn there or if the Cube moves into its space. A creature takes this damage only once per turn.

On your later turns, you can take a Magic action to fly to a Cube up to 30 feet.

Using a Higher-Level Spell Slot. The damage increases by 2d4 for each spell slot level above 2.