Armor Class 19 (natural armor)
Hit Points 187 (25d10 + 50)
Speed fly 20 ft.
Saving Throws STR +5, CON +7, INT +9, WIS +7, CHA +9
Skills Perception +12
Damage Immunities poison
Condition Immunities charmed, exhaustion, paralyzed, petrified, poisoned, prone
Senses darkvision 120 ft., passive Perception 22
Languages Deep Speech, Undercommon
Challenge 14
Negative Energy Cone. The death tyrant's central eye emits an invisible, magical 150-foot cone of negative energy. At the start of each of its turns, the tyrant decides which way the cone faces and whether the cone is active. Any creature in that area can't regain hit points. Any humanoid that dies there becomes a zombie under the tyrant's command. The dead humanoid retains its place in the initiative order and animates at the start of its next turn, provided that its body hasn't been completely destroyed.
Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 14 (4d6) piercing damage.
Eye Rays. The death tyrant shoots three of the following magical eye rays at random (reroll duplicates), choosing one to three targets it can see within 120 feet of it:
Eye Ray. The death tyrant uses one random eye ray.
Monster Manual (2014), p. 29