Efreeti

If the monster , its body dissolves into dirt, and it gains a new body in days, reviving with all its Hit Points somewhere on the Plane of Fire.

The monster has Advantage on saving throws against spells and other magical effects.

The monster has a [[/r 1d100csWish spell. If the monster knows it, the monster can cast it only on behalf of a non-genie creature who communicates a wish in a way the monster can understand. If the monster casts the spell for the creature, the monster suffers none of the spell's stress. Once the monster has cast it three times, the monster can't do so again for 365 days.

The monster makes three attacks, using or in any combination.

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The monster casts one of the following spells, requiring no Material components and using Charisma as the spellcasting ability (spell save DC ):
At Will: Detect Magic, Elementalism
1/Day Each: Gaseous Form, Invisibility, Major Image, Plane Shift, Tongues, Wall of Fire (level 7 version)