Agarat

Undead Nature. The agarat doesn’t require air, food, drink, or sleep.

Carrion Stench. The agarat exudes a faint, putrid odor. Any creature that starts its turn within 5 feet of the agarat must succeed on a DC 13 Constitution saving throw or have disadvantage on attack rolls until the start of its next turn.

Turn Resistance. The agarat has advantage on saving throws against any effect that turns undead.

Multiattack. The agarat makes three attacks: two with its claws and one with its bite.

Claws. Melee Weapon Attack: +5 to hit, reach 5 ft., one target.
Hit: 5 (1d6 + 2) slashing damage.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target.
Hit: 5 (1d6 + 2) piercing damage.

Scream (Recharge 5–6). The agarat unleashes a blood-curdling scream charged with necrotic energy. Each creature within 20 feet of it that can hear the scream must succeed on a DC 14 Constitution saving throw or suffer one temporary level of exhaustion and take 18 (4d8) necrotic damage. A creature reduced to 0 hit points by this effect falls unconscious but is stable. A creature that accumulates six levels of exhaustion in this way dies instantly and rises 24 hours later as a ghoul under the agarat’s control. The exhaustion caused by this ability fades after 1d4 hours as the creature’s life force reasserts itself.