Cocky Imp

Devil's Sight. Magical darkness doesn't impede the Cocky Imp darkvision.

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

Shapechanger. The Cocky imp can use its action to polymorph into a beast form that resembles a rat (speed 20 ft.), a raven (20 ft., fly 60 ft.), or a spider (20 ft., climb 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. If this form dies it returns to its original form.

Fetid Claws (Bite in Beast Form). Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 7 (1d6 + 3) piercing damage, and the target must make a DC 13 Constitution saving throw, taking 10 (3d6) poison damage on a failed save, or half as much damage on a successful one.

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

Sharp Tongue: The Cocky imp hurls slurs and mocks a creature within 60ft of it, the creature must succeed a DC 13 Charisma Saving throw or take 4 (1d6) psychic damage, a Creature hit by this effect has desadvantage in its next attack roll.

Burn in Fire; As a Reaction towards a melee attack the Cocky imp can burst into flames, the creature that targeted the Cocky imp must suceed in a DC 13 Dexterety saving throw or take 2d6 fire damage, half damage on a sucess.