Armor Class 16
Hit Points 97 (15d8 + 30)
Speed 30 ft.
Saving Throws CON +5, WIS +5
Damage Immunities necrotic, poison
Condition Immunities charmed, exhaustion, poisoned
Senses Darkvision 120 ft., passive Perception 12
Languages Abyssal, Common
Challenge 6
Stench. con DC 13, any creature that starts its turn in a 5-foot Emanation originating from the ghast. The target has the Poisoned condition until the start of its next turn. The target is immune to this ghast's Stench for 24 hours.
Multiattack. The ghast makes two Horrific Necrosis attacks. It can replace one attack with a Claw attack.
Claw. m +6, reach 5 ft. Hit: 13 (3d6 + 3) Slashing damage. If the target isn't an Undead, it has the Paralyzed condition until the end of its next turn.
Horrific Necrosis. m,r +7, reach 5 ft. or range 120 ft. Hit: 15 (2d10 + 4) Necrotic damage, and the target has the Frightened condition until the end of its next turn.
Monster Manual (2024), p. 130