Assassinate. During its first turn, the ghoul has advantage on attack rolls against any creature that hasn’t taken a turn. Any hit the ghoul scores against a surprised creature is a critical hit.

Evasion. If the ghoul is subjected to an effect that allows it to make a Dexterity saving throw to take only half damage, the ghoul takes no damage if it succeeds on the saving throw, and only half damage if it fails.

Magic Resistance. The ghoul has advantage on saving throws against spells and other magical effects.

See Lifeforce. The ghoul can determine the current and maximum HP of any creature within 120 feet, no action is required.

Bite. Melee Weapon Attack: +10 to hit, reach 5 ft., one creature. Hit: 13 (2d6 + 6) piercing damage.

Claws. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 9 (2d4 + 6) slashing damage. If the target is a creature other than an elf or undead, it must succeed on a DC 16 Constitution saving throw or be paralyzed for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

Smoky Tongue. Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 21 (3d10+6) necrotic damage and the ghoul regains hit points equal to the damage done. The target must succeed on a DC 16 Constitution saving throw, or its hit point maximum is reduced by an amount equal to the damage taken. This reduction lasts until the target finishes a long rest. The target dies if this effect reduces its hit point maximum to 0.

Mind Fog. The abyssal ghoul conjures a 60 ft radius cloud of heavily obscured fog, centred on a point within 30 ft. of it. The fog lasts for 1 minute or until dispersed with moderate or higher wind. Creatures within the fog have disadvantage on Intelligence, Wisdom, and Charisma checks and saving throws.

Uncanny Dodge. When an attack hits the ghoul, it can use its reaction to halve the damage.