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This creature resembles both a mammal and a reptile. Its long skull sports a massive maw with saberlike canine teeth. Its muscular frame sits atop pillarlike legs, and a thick tail lashes behind it.

Originally  Posted by Shade of the En World forums.

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An arctognathus is  a mid-sized gorgonopsian, a group of carnivorous therapsids that predated the dinosaurs. As large as a man, arctognathus was able to bring down prey larger than itself with its deadly, saberlike incisors. Its keen sense of smell allows it to easily Track prey over long distances.

An arctognathus is  5 to 6 feet long, weighing around 200 pounds.

Gorgonopsid, Arctognathus
Medium animal
Hit Dice4d8+8 (26 hp)
Speed40 ft. (8 squares)
Armor Class15 (+2 Dexterity, +5 natural), touch 12, flat-footed 14
Base Attack/Grapple+3/+7
AttackBite +7 melee (1d6+6/19-20×3)
Full AttackBite +7 melee (1d6+6/19-20×3)
Space/Reach5 ft./5 ft.
Special AttacksAugmented critical, tear fallen +1d6, trip
Special QualitiesLow-Light Vision, Scent
SavesFort +6, Ref +6, Will +2
AbilitiesStrength 19, Dexterity 15, Constitution 15, Intelligence 2, Wisdom 13, Charisma 6
SkillsHide +7, Jump +8, Listen +5, Move Silently +7, Spot +5, Survival +4
FeatsAlertness, Track
EnvironmentWarm plains
OrganizationSolitary, pair, or pack (3-4)
Challenge Rating3
AlignmentAlways neutral
Advancement5-8 HD (Medium)
Level Adjustment


An arctognathus attempts to sink its saber-like teeth into prey, drag it to the ground, and tear it to shreds.

Augmented Critical (Ex): The saber teeth of an arctognathus strike with deadly precision. An arctognathus’s bite attack threatens a critical hit on a roll of 19-20 and deals x3 damage on a successful critical hit.

Tear Fallen (Ex): An arctognathus can deal an addition +1d6 points of damage to a prone opponent.

Trip (Ex): An arctognathus that hits with a bite attack can attempt to make a trip check (+4 modifier) as a free action without making a touch attack or provoking an attack of opportunity. If the attack fails, the opponent cannot react to trip the arctognathus.

Skills: An arctognathus gains a +4 racial bonus on all Hide and Move Silently checks.

Originally appeared as “giant therapsid” in Dragon Magazine #176 (1991).

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