Dragon Eel

Huge dragon, neutral

Armor Class 18 (natural armor)
Hit Points 230 (20d12 + 100)
Speed 20 ft., swim 60 ft.

26 (+8) 12 (+1) 20 (+5) 14 (+2) 13 (+1) 14 (+2)

Saving Throws Str +12, Dex +5, Int +6, Wis +5, Cha +6
Skills Acrobatics +5, Athletics +12, Insight +5, Perception +6
Damage Immunities lightning
Condition Immunities paralyzed, prone
Senses darkvision 60 ft., passive Perception 16
Languages Common, Draconic, Primordial
Challenge 12 (8,400 XP)

Special Traits

  • Limited Amphibiousness. The dragon eel can breathe air and water, but it needs to be submerged at least once every six hours to avoid suffocation.
  • Shocking Touch. A dragon eel’s body generates a potent charge of lightning. A creature that touches or makes a successful melee attack against a dragon eel takes 5 (1d10) lightning damage.
  • Storm Glide. During storms, the dragon eel can travel through the air as if under the effects of a fly spell, except using its swim speed.


  • Multiattack. The dragon eel makes one bite attack and one tail slap attack.
  • Bite. Melee Weapon Attack: +12 to hit, reach 10 ft., one target. Hit: 26 (4d8 + 8) piercing damage plus 5 (1d10) lightning damage, and the target must succeed on a DC 18 Constitution saving throw or become paralyzed for 1d4 rounds.
  • Tail Slap. Melee Weapon Attack: +12 to hit, reach 10 ft., one target. Hit: 30 (5d8 + 8) bludgeoning damage plus 5 (1d10) lightning damage and push the target up to 10 feet away.
  • Lightning Breath (Recharge 6). The dragon eel exhales lightning in a 60-foot line that is 5 feet wide. Each target in that line takes 55 (10d10) lightning damage, or half damage with a successful DC 18 Dexterity saving throw.


  • Slam. Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 58 (10d10 + 3) bludgeoning damage.
  • Leaves. Ranged Weapon Attack: +3 to hit, range 30/60 ft., one target. Hit: 45 (10d8) slashing damage.
  • Breath Weapon (Recharge 6). A dragonleaf tree can issue forth a breath weapon from its leaves appropriate to the dragon it honors. The creature’s breath weapon deals 49 (14d6) damage, or half damage to targets that make a successful DC 15 Dexterity saving throw. A black, copper, or green tree breathes a 60-foot line of acid; a blue or bronze tree breathes a 60-foot line of lightning; a brass, gold, or red tree breathes a 30-foot cone of fire; and a silver or white tree breathes a 30-foot cone of cold.


The dragon eel’s unmistakable slender form sports a powerful single finned tail and wicked jaws like a matched pair of serrated blades. Dragon eels vary widely in color from browns and blacks to brilliant iridescent hues in mottled patterns.


Fond of Servants. While most dragon eels are solitary and irascible, on rare instances some form pairs or small bands-and some gather humanoid servants.

Magnetic and Lightning. Dragon eels make their natural homes in twisting underwater cave systems and prefer magnetically-aligned, metallic cavern formations navigable with their refined electric-sight. Some dragon eels use their constant electric auras combined with acquired alchemical reagents to electroplate portions of their golden hoard onto the walls of their dwellings.

Pirate Fleets and Dominions. Dragon eels claim large swaths of shoreline as their demesne. Although neither particularly cruel nor righteous, a dragon eel often lords over awed tribes, allowing locals to revere it as a mighty spirit. Some dragon eels use such tribes as the core of a pirate fleet or raiding parties carried on their backs. Their ability to swim through air during storms adds to their reputation as terrible thunder spirits.

Bribable. Their deceptive moniker sometimes lulls foolish sailors into a false confidence when they expect to face a simple if dangerous eel beast, but instead find themselves dealing with intelligent draconic kings of the coastal shallows. Wise sailors traveling through known dragon eel territory bring tithes and offerings to placate them.

Section 15: Copyright Notice

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