Air Elemental Servant

Shapechanger. The elemental can use its action to polymorph into a beast form that mostly resembles a cat (speed 40 ft., climb 30 ft.), or a raven (20 ft., fly 60 ft.), or back into its true form. Its statistics are the same in each form, except for the speed changes noted. Any equipment it is wearing or carrying isn't transformed. It reverts to its true form if it dies. A creature can use its action to inspect the false appearance and must succeed on an Intelligence (Investigation) check of DC 10 to determine that the air elemental is not a true cat or a true raven.

Death Burst. When the elemental is reduced to zero hit points, it explodes in a burst of air and returns to place of creation in the elemental plane of air. Each large or smaller creature within 5 feet of it must then succeed on a DC 10 Constitution saving throw or be pushed up to 5 feet away from the place where the elemental died.

Living to serve. While in its true form, the elemental can perform simple tasks that a human servant could do, such as fetching things, cleaning, mending, folding clothes, lighting fires, serving food, and pouring wine.

Air Blade. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 6 (1d4 + 4) slashing damage.

Invisibility. While in its true form, the elemental can become completely transparent until it attacks, cast a spell, or until its concentration ends (as if concentrating on a spell). Any equipment the elemental wears or carries is not invisible.

One with the wind. The elemental can create a harmless sensory effect using air within 30ft, such as causing leaves to rustle, wind to slam shutters shut, or your clothing to ripple in a breeze at will.