Troll, Lake

Family: Troll

Large giant, chaotic evil

Armor Class 15 (natural armor)
Hit Points 126 (12d10 + 60)
Speed 20 ft., swim 40 ft.

20 (+5) 13 (+1) 20 (+5) 8 (-1) 10 (+0) 6 (-2)

Skills Perception +3
Senses darkvision 60 ft., passive Perception 13
Languages Common, Giant
Challenge 7 (2,900 XP)

Special Traits

  • Amphibious. The lake troll can breathe air and water.
  • Keen Smell. The lake troll has advantage on Wisdom (Perception) checks that rely on smell.
  • Regeneration. The lake troll regains 10 hit points at the start of its turn. If the lake troll takes cold or fire damage, it regains only 5 hit points at the start of its next turn; if it takes both cold and fire damage, this trait doesn’t function at the start of the lake troll’s next turn. The lake troll dies only if it starts its turn with 0 hit points and doesn’t regenerate.


  • Multiattack. The lake troll makes one bite attack and two claw attacks.
  • Bite. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 9 (1d8 + 5) slashing damage.
  • Claws. Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 14 (2d8 + 5) piercing damage. If the lake troll hits a creature with both claw attacks in the same turn, the target creature must make a successful DC 16 Dexterity saving throw or its weapon (if any) gains a permanent and cumulative -1 penalty to damage rolls. If the penalty reaches -5, the weapon is destroyed. A damaged weapon can be repaired with appropriate artisan’s tools during a long rest.


This large, lanky creature has arms too long for its body. Its hands are webbed and equipped with wicked claws. Its skin is covered in dull green scales and embedded with stones,, and limp hair like scraggly seaweed hangs across its long-nosed face.


Water-dwelling cousins of the more common trolls, lake trolls are both stronger and slightly more intelligent, but thankfully less common. Accompanied by a reek of old, rotting fish, these slimy creatures live beneath the surface of lakes, ponds, rivers, and sometimes even ocean coves.

Violently Territorial. A lake troll is savage in the defense of its claimed expanse of territory; any encroachment into the creature’s water is met with sudden violence from the depths.

Fishermen are the most vulnerable to these attacks, especially when they explore new bodies of water.

Cruel Cunning. Even seasoned soldiers are wise enough to fear the claws of a lake troll; a person with no weapon facing the creature is doomed. Lake trolls delight in splintering wood, twisting metal with their talons, and dulling blades on their tough hide. They often prioritize wielders of grand weapons so they can delight in the horror of their newly-disarmed prey. Lake trolls are cunning ambushers. They make use of the water to cover their attack and to protect themselves from the flames of would-be troll hunters.

Hard to Kill. A lake troll’s regeneration is shut down only by cold and fire damage at nearly the same time, making them tricky to fight and exceedingly difficult to kill. Many adventurers have been shocked or slain when a lake troll they presumed was burned to death suddenly leapt back into the fray. Because they’re reclusive and so very lethal, these creatures are poorly understood by most scholars.

Section 15: Copyright Notice

Tome of Beasts. Copyright 2016, Open Design; Authors Chris Harris, Dan Dillon, Rodrigo Garcia Carmona, and Wolfgang Baur.