Armor Class 11 (natural armor)
Hit Points 58 (9d8 + 18)
Speed 20 ft.

Saving Throws: WIS +2
Damage Vulnerabilities: Fire
Damage Resistances: Bludgeoning, Piercing, and Slashing from Nonmagical Attacks
Damage Immunities: Necrotic, Poison
Condition Immunities: Charmed, Exhaustion, Frightened, Paralyzed, Poisoned
Senses Darkvision: 60 ft., Passive Perception 10
Languages: None
Challenge Rating: 3 (700 XP)
Proficiency Bonus: +2

Actions:

Multiattack. The Il'Utha can use its Dreadful Glare and makes one attack with its rotting fist.

Rotting Fist. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) bludgeoning damage plus 10 (3d6) necrotic damage. If the target is a creature, it must succeed on a DC 12 Constitution saving throw or take another 10 (3d6) desiccation damage.

Dreadful Glare. The Il'Utha targets one creature it can see within 60 feet of it. If the target can see the sand corpse, it must succeed on a DC 11 Wisdom saving throw against this magic or become frightened until the end of the Il'Utha's next turn. If the target fails the saving throw by 5 or more, it is also paralyzed for the same duration. A target that succeeds on the saving throw is immune to the Dreadful Glare of all Il'Utha for the next 24 hours.