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By NobuTamura - Own work, CC BY-SA 3.0,, Eogyrinus
By NobuTamura email:[email protected] – Own work, CC BY-SA 3.0,

This amphibian is the size of a large crocodile, with a long, slender body and short legs. Its crocodilian head bears a maw filled with sharp teeth.

Originally Posted by Shade of the En World forums.
On this Thread

Eogyrinus is a powerful swimmer that moves quickly through the water. A predator, lying in wait in the shadows, better hunting in the water, Eogyrinus will make a grab for prey passing close by on land.

An eogyrinus is about 15 feet long and weighs close to 1,000 pounds.

Large animal (Aquatic)
Hit Dice4d8+28 (46 hp)
Speed5 ft. (1 square), Swim 30 ft.
Armor Class12 (-1 size, +1 Dexterity, +2 natural), touch 10, flat-footed 11
Base Attack/Grapple+3/+13
AttackBite +9 melee (1d8+9)
Full AttackBite +9 melee (1d8+9)
Space/Reach10 ft./5 ft.
Special AttacksDeath roll, improved grab
Special QualitiesAmphibious, Low-Light Vision
SavesFort +11, Ref +5, Will +1
AbilitiesStrength 23, Dexterity 12, Constitution 25, Intelligence 1, Wisdom 11, Charisma 5
SkillsHide +3*, Listen +3, Move Silently +3, Spot +4, Swim +17
FeatsStealthy, Weapon Focus (bite)
EnvironmentWarm forests and marshes
OrganizationSolitary or pod (2-12)
Challenge Rating3
AlignmentAlways neutral
Advancement5-6 HD (Large); 7-14 HD (Huge)
Level Adjustment


Eogyrinus hunt prey much like crocodiles, hiding the bulk of its body underwater, with only its eyes and nostrils breaking the surface. It grabs prey that approaches the water, drags it under, and attempts to rip it apart with its death roll.

Death Roll (Ex): An eogyrinus that successfully gets a hold on an opponent with its improved grab ability lodges its prey against natural terrain or even another eogyrinus, then bites down hard and twists its body to tear off large pieces of meat. If another eogyrinus joins the grapple, both eogyrinuses deal maximum damage. This attack deals bite damage each round until the victim breaks free, the eogyrinus is slain, or the victim dies.

Improved Grab (Ex): To use this ability, an eogyrinus must hit an opponent of up to one size smaller with its bite attack. It can then attempt to start a grapple as a free action without provoking an attack of opportunity. If it wins the grapple check, it establishes a hold and can use its death roll in the following round.

Skills: An eogyrinus has a +8 racial bonus on any Swim check to perform a special action or avoid a hazard. It can always choose to take 10 on a Swim check, even if distracted or endangered. It can use the run action while swimming, provided it swims in a straight line.

*An eogyrinus gains a +4 racial bonus on Hide checks when in the water. Further, an eogyrinus can lie in the water with only its eyes and nostrils showing, gaining a +10 cover bonus on Hide checks.

Originally apperead in Dragon Magazine #176 (1991).

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