Tiny fiend (demon),

Armor Class:

Hit Points: 18 (4d4 + 8) 4d4+8

Speed: 30 ft

STR

6 -2

DEX

16 +3

CON

14 +2

INT

12 +1

WIS

10 +0

CHA

14 +2

Saving Throws: +5, Cha +4

Skills:

Avoidance.

The imp takes half damage from effects that allow it to make a Dexterity saving throw to take only half damage, and no damage on a successful save.  

Devoted Minion.

The imp shares its master's initiative and obeys verbal commands. If not commanded, it takes the Dodge action.

Damage Resistances: cold, fire; bludgeoning, piercing, and slashing from nonmagical weapons

Damage Immunities: poison

Condition Immunities: poisoned

Senses: darkvision 60 ft., passive Perception 10

Languages: understands Eredun and Common (via telepathy with master up to 120 ft.)

Proficiency Bonus: +2

Actions

Firebolt. Ranged Spell Attack: +5 to hit, range 60 ft., one target. (2d6 + 2) fire damage.   Flee (Recharge 5–6). The imp turns invisible and teleports up to 60 feet to an unoccupied space it can see. This ability recharges on a short or long rest if not used in combat.   Singe Magic (1/day). The imp targets one creature within 30 feet. That creature may immediately make a new saving throw to end one magical effect currently afflicting it (as if dispel magic were cast at 2nd level, affecting only one ongoing spell effect).