Dinosaur, Spinosaurus

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Gargantuan Animal


Hit Dice: 20d8+132 (222 hp)

Initiative: 1

Speed: 40 ft.

AC: 16 (-4 size, +1 Dex, +9 natural), touch 7, flat-footed 15

Attacks: Bite +24 melee and 2 claws +19 melee

Damage: Bite 2d8+13, claw 2d6+6

Face/Reach: Face/Reach: 20 ft. /20 ft.

Special Attacks: Frightful presence, improved grab, swallow whole, trample 2d8+19

Special Qualities: Darkvision 60 Ft., Low-Light Vision, Scent

Saves: Fort +18, Ref +13, Will +8

Abilities: Str 36, Dex 13, Con 23, Int 2, Wis 15, Cha 10

Skills: Listen +16, Spot +15

Feats Alertness, Run, Toughness x4, Track

Climate/Terrain: Warm forests, plains, hills, and marsh

Organization: Solitary or pair

Challenge Rating: 13

Treasure: None

Alignment: Always neutral

Advancement: 21-40 HD (Gargantuan); 41-60 HD (Colossal)

Level Adjustment: -

Spinosaurus is the largest bipedal predatory dinosaur, towering over even tyrannosaurus. It has longer arms than the latter, and it occasionally moves about on all fours. Spinosaurus also has a large, sail-like, ribbed fin on its back. The purpose of this appendage is unclear, but spinosaurus has a relatively flexible spine, so when it arches its back, the sail spreads. Spinosaurus has a large head with sharp, straight, non-serrated teeth set into a powerful, crocodilian lower jaw.


Though capable of running down prey, spinosaurus prefers to freeze opponents in their places with an unearthly, soul-searing bellow. When it must chase prey, it tramples smaller creatures and grabs larger ones with its powerful jaws while tearing with its claws.

Frightful Presence (Ex): When a spinosaurus bellows (a standard action), it inspires terror in all creatures within 30 feet that have fewer Hit Dice or levels than it has. Each potentially affected opponent must succeed at a Will save (DC 20) or become shaken for 5d6 rounds. A successful save leaves that opponent immune to that spinosaurus’s frightful presence for 24 hours.

Improved Grab (Ex): If spinosaurus hits an opponent that is at least one size category smaller than itself with a bite attack, it deals normal damage and attempts to start a grapple as a free action without provoking an attack of opportunity (grapple bonus +40). If it gets a hold, it can try to swallow the opponent in the next round. Alternatively, spinosaurus has the option to conduct the grapple normally, or simply use its jaws to hold the opponent (-20 penalty on grapple check, but the spinosaurus is not considered grappled). In either case, each successful grapple check it makes during successive rounds automatically deals bite damage.

Swallow Whole (Ex): Spinosaurus can swallow a grabbed opponent that is at least two size categories smaller than itself by making a successful grapple check (grapple bonus +40). Once inside the gullet, the opponent takes 2d8+10 points of bludgeoning damage plus 1d8+4 points of acid damage per round from the dinosaur’s digestive juices. A successful grapple check allows the swallowed creature to climb out of the gullet and return to the mouth, where another successful grapple check is needed to get free. Alternatively, a swallowed creature can try to cut its way out with either claws or a light piercing or slashing weapon. Dealing at least 25 points of damage to the digestive tract (AC 14) in this way creates an opening large enough to permit escape. Once a single swallowed creature exits, muscular action closes the hole; thus, another swallowed opponent must cut its own way out. A Gargantuan spinosaurus’s gullet can hold 2 Large, 8 Medium-size, 32 Small, or 128 Tiny or smaller opponents.

Trample (Ex): As a standard action during its turn each round, spinosaurus can trample opponents at least one size category smaller than itself. This attack deals 2d8+19 points of bludgeoning damage. A trampled opponent can attempt either an attack of opportunity at a -4 penalty or a Reflex save (DC 33) for half damage.

Skills: Spinosaurus receives a +2 racial bonus on Listen and Spot checks