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Dinosaur; Tylosaurus

by Jamie Baty

DMR2 29
Colossal Animal
Hit Dice: 24d8+288 (396 hp)
Initiative: +7 (+3 Dex, +4 Improved Initiative)
Speed: 10 ft (2 squares), Swim 80 ft. (16 squares)
Armour Class: 17 (-8 size, +3 Dex, +12 natural), touch 5, flat-footed 14
Base Attack/Grapple: +18/+53
Attack: Bite +30 melee (6d6 +19)
Full Attack: Bite +30 melee (6d6 +19)
Space/Reach: 30 ft.+/20 ft.+
Special Attacks: Improved grab, swallow whole
Special Qualities: Low-light vision, Hold Breath, Scent
Saves: Fort +26, Ref +17, Will +11
Abilities: Str 49, Dex 17, Con 35, Int 2, Wis 13, Cha 8
Skills: Hide -13, Intimidate +4, Listen +6, Spot +6, Survival +6, Swim +34
Feats: Cleave, Dodge, Improved Critical (bite), Improved Initiative, Iron Will, Mobility, Power Attack, Swim-by Attack, Weapon Focus (Bite)
Environment: Warm aquatic
Organisation: Solitary, or Pair
Challenge Rating: 23
Treasure: None
Alignment: Always neutral
Advancement: 25-72 HD (Colossal)
Level Adjustment: -

The massive dinosaur heading towards your boat dwarfs any aquatic creature you've ever seen...

This creature is a huge, aquatic, carnivorous dinosaur. Its body is 90 feet long, and its head is capped by a high dorsal crest. Tylosauruses can swim very swiftly, propelled by their four broad fins. The tylosaurus is a terror to anyone on the seas, and it fears absolutely nothing.

A tylosaurus will attack anything of size within its perceived territory. It will bite viciously, and will usually attempt to swallow an opponent after inflicting bite damage for a round or two.

Improved Grab (Ex): If a tylosaurus hits with its bite attack, it deals normal damage and attempts to start a grapple as a free action without provoking an attack of opportunity. If the grapple succeeds, the tylosaurus may hold the victim and inflict bite damage automatically each round. After the hold is established, it may attempt to swallow the creature in any following round.

Swallow Whole (Ex): A tylosaurus can try to swallow a grabbed opponent of up to two sizes smaller by making a successful grapple check. The swallowed creature takes 4d8+8 points of bludgeoning damage and 2d8 points of acid damage per round from the tylosaurus's gizzard. A swallowed creature can cut its way out by using a light slashing or piercing weapon to deal 50 points of damage to the gizzard (AC 16). Once the creature exits, muscular action closes the hole; another swallowed opponent must cut its own way out.
A colossal tylosaurus's gizzard can hold 2 huge, 8 large, 32 medium, 128 small or 512 Diminutive or smaller opponents.

Hold Breath (Ex): A tylosaurus can hold its breath for a number of rounds equal to 10x its Constitution score before it risks drowning. For a typical tylosaurus, this equals 350 rounds, or a little over 58 minutes.

Skills: A tylosaurus gains a +8 racial bonus to any swim check. It may always 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.

Note: Swim-by attack is found in Stormwrack and acts like fly-by attack, only in water instead of air.