Armor Class 18 ({@item plate armor|phb})
Hit Points 127 (17d8 + 51)
Speed 40 ft., swim 40 ft.
Damage Resistances acid, [object Object]
Damage Immunities poison
Condition Immunities paralyzed, petrified, poisoned, prone
Senses darkvision 60 ft., passive Perception 10
Languages Aquan, one language of its creator's choice
Challenge 7
Magic Weapons. The myrmidon's weapon attacks are magical.
Multiattack. The myrmidon makes three trident attacks.
Trident. Melee or Ranged Weapon Attack: +7 to hit, reach 5 ft. or range 20/60 ft., one target. Hit: 7 (1d6 + 4) piercing damage, or 8 (1d8 + 4) piercing damage if used with two hands to make a melee attack.
Freezing Strikes (Recharge 5–6). The myrmidon uses Multiattack. Each attack that hits deals an extra 5 (1d10) cold damage. A target that is hit by one or more of these attacks has its speed reduced by 10 feet until the end of the myrmidon's next turn.
Mordenkainen's Tome of Foes, p. 203