Cherub

Shapechanger. The cherub can use its action to polymorph into a carp (0 ft., swim 40 ft.), a dove (20 ft., fly 60 ft.), or a mouse (speed 20 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, except for its dagger, shortbow, and quiver of arrows, which are absorbed or borne by the new form. It reverts to its true form if it dies.

Angelic Weapons. The cherub’s weapon attacks are magical. When the cherub hits with any weapon, the weapon deals an extra 1d8 radiant damage (included in the attack).

Innate Spellcasting. The cherub’s spellcasting ability is Charisma (spell save DC 12). The cherub can innately cast the following spells, requiring no material components:

At will: detect evil and good

1/day each: commune

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

Water Breathing (Carp Form Only). The cherub can breathe only underwater.

Dagger (Bite in Beast Form). Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 5 (1d4 + 3) piercing damage plus 4 (1d8) radiant damage.

Shortbow (Angel Form Only). Ranged Weapon Attack: +5 to hit, range 40/160 ft., one target. Hit: 6 (1d6 + 3) piercing damage plus 4 (1d8) radiant damage.

Healing Touch (1/day). The cherub touches another creature. The target magically regains 11 (2d8 + 2) hit points. In addition, the touch removes all diseases and neutralizes all poisons afflicting the target.