Bellon's Mosquito of Malice

You conjure a Tiny intangible spirit, in the form of a mosquito, in an unoccupied space you can see within range. On each of your later turns, you can take a Magic Action to move the spirit up to 30 Feet in any direction.

The spirit seeks to inflict suffering on the living. When a creature starts its turn within 5 Feet of the spirit, you can force the creature to make a Constitution Saving Throw. A creature succeeds automatically if it is a Construct or Undead. On a failure, the spirit disappears, the target takes 1 Piercing Damage, and a swollen red welt appears on its skin for the remaining duration of the spell. When the target takes an action other than the Attack Action during this time, it must succeed on a Constitution Saving Throw or waste its action scratching at the welt and itching.