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Castoroides (Giant Beaver)

Restoration by Charles R. Knight
Restoration by Charles R. Knight

The Castoroides is a massive, lumbering creature with a flat, paddle-shaped tail and large, sharp teeth. It has a powerful, stocky build and stands at about six feet tall at the shoulder. Covered in thick, matted fur, it has a distinct, reddish-brown coloration that blends in with the surrounding forest.

The Castoroides is a massive, lumbering creature with a flat, paddle-shaped tail and large, sharp teeth. It has a powerful, stocky build and stands at about six feet tall at the shoulder. Covered in thick, matted fur, it has a distinct, reddish-brown coloration that blends in with the surrounding forest.

The creature is a formidable foe, with a high strength score that reflects its immense physical power. Its sharp teeth and claws make it a fearsome melee combatant, while its semi-aquatic nature allows it to move with ease through both land and water.

While not inherently aggressive, thy can become fiercely protective of its territory or family group, making it a dangerous creature to cross. Its ability to construct and defend large dams and lodges adds to its defensive capabilities, as it can use these structures to block off access to its lair or force enemies to navigate dangerous terrain.

All in all, the Castoroides is a versatile and fearsome creature that can pose a significant challenge to even the most skilled adventurers. Its combination of brute strength, sharp claws and teeth, and semi-aquatic nature make it a unique and formidable addition.


Castoroides

Castoroides
Midjourney

Large beast, unaligned

Armor Class: 14 (natural armor)

Hit Points: 93 (11d10 + 33)

Speed: 30 ft., swim 40 ft.

STRDEXCONINTWISCHA
20 (+5)12 (+1)16 (+3)2 (-4)12 (+1)6 (-2)

Skills: Perception +3, Athletics +7

Senses: passive Perception 13

Actions

  • Multiattack: The creature makes two attacks with its bite or tail slap.
  • Bite: Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6 + 5) piercing damage.
  • Tail Slap: Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: 13 (2d8 + 5) bludgeoning damage.

Challenge Rating: 4 (1,100 XP)

Lair Actions

The castoroides can take lair actions, choosing from the options below. Only one lair action can be used per round and only at the end of another creature’s turn. The castoroides can’t use the same lair action two rounds in a row.

  • The castoroides makes a loud warning call, alerting nearby beavers to danger. All beavers within 120 feet gain advantage on initiative rolls and attack rolls until the end of the castoroides’ next turn.
  • The castoroides uses its powerful tail to slap the ground, causing tremors in the area. All creatures within 30 feet of the castoroides must make a DC 14 Dexterity saving throw or be knocked prone.
  • The castoroides summons a swarm of angry beavers to its aid. A swarm of beavers appears within 60 feet of the castoroides and acts immediately after it in the initiative order.

Castoroides

Castoroides
Midjourney

Originally Posted by bhu of the Wizards Community forums.
On this Thread

Castoroides
Medium animal
Hit Dice3d8+6 (19 hp)
Initiative+1
Speed30 ft. (6 squares), Swim 30 ft.
Armor Class13 (+1 Dexterity, +2 Natural Armor), touch 11, flat-footed 12
Base Attack/Grapple+2/+5
AttackBite +5 melee (1d6+3)
Full AttackBite +5 melee (1d6+3)
Space/Reach5 ft./5 ft.
Special Attacks 
Special QualitiesHold Breath, Low-Light Vision
SavesFort +5, Ref +4, Will +2
AbilitiesStrength 16, Dexterity 12, Constitution 15, Intelligence 2, Wisdom 12, Charisma 6
SkillsHide +3, Listen +5, Spot +4, Swim +12
FeatsAlertness, Endurance
EnvironmentTemperate or Cold Forests
OrganizationSolitary or Pair
Challenge Rating1
TreasureNone
AlignmentAlways Neutral
Advancement4-5 HD (medium)
Level Adjustment

Hold Breath (Ex) It can hold its breath for a number of rounds equal to 6 x its Constitution score before it risks drowning.

Skill Bonuses It has a +8 Racial Bonus on Swim checks. It can always choose to take 10 on a Swim check even if distracted or endangered.

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