Elemental Demise. If the efreeti dies, its body disintegrates in a flash of fire and puff of smoke, leaving behind only equipment the efreeti was wearing or carrying.

Body of Fire. Anything which attempts to grapple or restrain this creature takes 2d6 fire Damage when it performs this action and at the top of each of its turns until the Grapple or Restraint has been broken.

Innate Spellcasting. The efreeti's innate spellcasting ability is Charisma (spell save DC 17, +9 to hit with spell attacks). This is Pact Magic stemming from their masters in the city of Brass so all spells are cast at 5th Level or higher if there base level is more than 5th and require no material components. At Will spells are cast at there base level:

This creature has the ability to add it's Charisma modifier to the damage dealt by any fire based spells 

At will: Detect Magic, Alter Self, Enlarge/Reduce

3/Day Each: Conjure Elemental, Banishment 

1/Day Each: Flesh to Stone, Counterspell, Finger of Death, Wall of Fire, Fireball, 

Multiattack. The efreeti makes two Greatsword attacks or uses its Hurl Flame twice.

Greatsword. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 18 (2d12 + 6) slashing damage plus 12 (2d6 + 4) fire damage.

Hurl Flame. Ranged Spell Attack: DEX SAVE DC 17, range 120 ft., Explores in a 20ft Radius around the centre point . Hit: 25 (5d6 + 4) fire damage.

The creature has 1 use of Counterspell at 5th Level