Cherub

Shapechanger. The cherub can use its action to polymorph into a beast form that resembles a fox (speed 40 ft.), a eagle (10 ft., fly 60 ft.), or a owl (5 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.

Magic Resistance. The cherub has advantage on saving throws against spells and other magical effects.

Holy Smite (Claw in Beast Form). Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 5 (1d4 + 3) slashing damage, and the target must make a DC 11 Wisdom saving throw, taking 7 (2d6) radiant damage on a failed save, or half as much damage on a successful one.

Healing Touch (1/Day). The cherub touches another creature. The target magically regains 6 (1d8 + 2) hit points.

Invisibility. The cherub magically turns invisible until it attacks or until its concentration ends (as if concentrating on a spell). Any equipment the cherub wears or carries is invisible with it.