Orthon

Huge Fiend,

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• Armor Class: 17
• Hit Points: 105 (10d10 + 50)
• Speed: walk 30, climb 30

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STR	DEX	CON	INT	WIS	CHA
+6	+3	+5	+2	+2	+3

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• Condition Immunities: Charmed, Exhaustion, Poisoned
• Damage Immunities: None
• Resistances: None
• Vulnerabilities: None
• Senses: Darkvision 120 ft., Truesight 30 ft.
• Languages:
• Challenge Rating: 10

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Special Abilities

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

Actions

Infernal Dagger Melee Weapon Attack: +10 to hit, reach 5 ft., one target. Hit: 11 (2d4 + 6) force damage, and the target must make a DC 17 Constitution saving throw, taking 22 (4d10) poison damage on a failed save, or half as much damage on a successful one. On a failure, the target is also poisoned for 1 minute. The poisoned target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
2d4+6

Brass Crossbow Ranged Weapon Attack: +7 to hit, range 100/400 ft., one target. Hit: 14 (2d10 + 3) force damage. The target also suffers one of the following effects of the orthon’s choice; the orthon can’t use the same effect two rounds in a row:
2d10+3

Acid The target must make a DC 17 Constitution saving throw, taking 17 (5d6) acid damage on a failed save, or half as much damage on a successful one.
5d6

Blindness The target takes 5 (1d10) radiant damage. In addition, the target and each creature within 20 feet of it must succeed on a DC 17 Dexterity saving throw or be blinded until the end of the orthon’s next turn.
1d10

Concussion The target and each creature within 20 feet of it must make a DC 17 Constitution saving throw, taking 13 (2d12) thunder damage on a failed save, or half as much damage on a successful one.
2d12

Entanglement The target must succeed on a DC 17 Dexterity saving throw or be restrained for 1 hour by strands of sticky webbing. The target can escape by taking an action to make a DC 17 Strength or Dexterity check and succeeding.

Paralysis The target takes 22 (4d10) lightning damage and must succeed on a DC 17 Constitution saving throw or be paralyzed for 1 minute. The paralyzed target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
4d10

Tracking For the next 24 hours, the orthon knows the direction and distance to the target, as long as it’s on the same plane of existence. If the target is on a different plane, the orthon knows which one, but not the exact location there.

Bonus Actions

Invisibility Field (Recharge 4–6) The orthon becomes invisible. Any equipment it wears or carries is also invisible as long as the equipment is on its person. This invisibility ends immediately after it makes an attack roll or is hit by an attack roll.

Reactions

Explosive Retribution In response to dropping to 15 hit points or fewer, the orthon explodes. All other creatures within 30 feet of it must each make a DC 17 Dexterity saving throw, taking 9 (2d8) fire damage plus 9 (2d8) thunder damage on a failed save, or half as much damage on a successful one. The orthon, its infernal dagger, and its brass crossbow are destroyed.