Imp

Tiny Fiend (Devil), Lawful Evil

AC 13 Initiative +3 (13)
HP 21 (6d4 + 6)
Speed 20 ft., Fly 40 ft.

Skills Deception +4, Insight +3, Stealth +5
Resistances Cold
Immunities Fire, Poison; Poisoned
Senses Darkvision 120 ft. (unimpeded by magical Darkness); Passive Perception 11
Languages Common, Infernal
CR 1 (XP 200; PB +2)

Traits

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

Actions

Sting. Melee Attack Roll: +5, reach 5 ft. Hit: 6 (1d6 + 3) Piercing damage plus 7 (2d6) Poison damage.

Invisibility. The imp casts Invisibility on itself, requiring no spell components and using Charisma as the spell-casting ability.

Shape-Shift. The imp shape-shifts to resemble a rat (Speed 20 ft.), a raven (20 ft., Fly 60 ft.), or a spider (20 ft., Climb 20 ft.), or it returns to its true form. Its game statistics are the same in each form, except for its Speed. Any equipment it is wearing or carrying isn't transformed.