Sauroposeidon

Gargantuan Beast, Unaligned
“The Colossal Titan of the Ancient Canopy”

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Challenge: 9 (5,000 XP)  Proficiency Bonus: +4

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Armor Class 16 (natural armor)

Hit Points 168 (16d12 + 64)

Speed 40 ft.

STR	DEX	CON	INT	WIS	CHA
26 (+8)	9 (–1)	19 (+4)	2 (–4)	13 (+1)	6 (–2)

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Saving Throws

Con +8, Wis +5

Skills

Perception +5, Athletics +12

Senses

Passive Perception 15

Languages

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Traits

Trampling Colossus.

When the Sauroposeidon moves at least 20 feet in a straight line and moves through a space occupied by a Large or smaller creature, that creature must succeed on a DC 18 Strength saving throw or take 22 (4d8 + 4) bludgeoning damage and be knocked prone.

Towering Reach.

The Sauroposeidon’s melee reach is 20 feet due to its colossal neck and tail. It can target enemies high in trees, on ledges, or airborne within this range.

Earthshaker.

Whenever the Sauroposeidon moves or uses its Stomp, unsecured objects within 30 feet rattle or fall, and creatures on the ground must succeed on a DC 15 Dexterity saving throw or fall prone if they are not Huge or larger and within 10 feet of the Sauroposeidon’s space.

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Actions

Multiattack.

The Sauroposeidon makes two attacks: one with its Stomp and one with its Tail Sweep.

Stomp.

Melee Weapon Attack: +12 to hit, reach 10 ft., one prone or smaller creature.
Hit: 30 (4d10 + 8) bludgeoning damage. If the target is prone, the damage increases by 10 (3d6).

Tail Sweep.

Melee Weapon Attack: +12 to hit, reach 20 ft., one target.
Hit: 24 (3d10 + 8) bludgeoning damage. On a hit, the target must succeed on a DC 18 Strength saving throw or be knocked prone and pushed 10 feet.

Neck Sweep (Recharge 5–6).

The Sauroposeidon swings its massive neck in a wide, horizontal arc.
All creatures within a 20-foot radius must make a DC 18 Dexterity saving throw, taking 26 (4d12) bludgeoning damage on a failed save, or half as much on a success. Creatures that fail are also knocked prone.

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Legendary Actions

The Sauroposeidon can take 2 legendary actions, choosing from the options below. Only one legendary action can be used at a time and only at the end of another creature’s turn. The Sauroposeidon regains spent legendary actions at the start of its turn.

• Tail Swipe. The Sauroposeidon makes a Tail Sweep attack.
• Lumbering Step. The Sauroposeidon moves up to half its speed without provoking opportunity attacks.
• Ground Quake (Costs 2 Actions). The Sauroposeidon rears and slams both forefeet down. All creatures within 15 feet must make a DC 15 Constitution saving throw or be deafened and knocked prone.

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Tactics

• Defensive Guardian: Avoids unnecessary combat, but uses overwhelming force to defend territory, offspring, or sacred forest groves.
• Area Control: Uses Neck Sweep and Tail Sweep to punish groups, keeping enemies at bay.
• Crushing Advance: Combines Trampling Colossus and Earthshaker to disrupt formations as it moves.
• Natural Wonder: Might be revered or worshipped in primitive cultures or by druids, only fighting if provoked.

Sauroposeidon

This incredibly tall quadruped has a huge, almost erect neck, a moderately small tail, a very broad chest, thin legs and a short head with a rounded snout and a bellowing chamber within its high crest. It calls out loudly to alarm others as it walks the ocean coast or while it lurks amid the bog trees other creatures cannot reach, wary of fearsome carnivorous predators and outsiders.

Originally Posted by xidoraven of the Wizards Community forums.  

On this Thread

Sauroposeidon is the tallest of all known dinosaurs reaching a colossal size by full adulthood.

Sauroposeidon are known to reach 98 feet long and 55 feet tall. They are slow and clumsy, but they are more agile and controlled than a brachiosaurus, and their long legs and neck allow it to reach foliage that no other creature can naturally reach. They are herd organisms, and because of their size have few formidable enemies. Vicious
and fierce carnosaurs find difficulty in taking one down, although the savage nature of such a beast has been known to find success.

Sauroposeidon are more keen than their smaller counterparts, and because of their agility and marginally better intellect have been known to be trained for certain tasks including basic riding commands and long-distance signalling without magical intervention.

Dinosaur, Sauroposeidon
Colossal animal
Hit Dice	30d8+282 (402 hp)
Initiative	-1
Speed	40 ft. (8 squares)
Armor Class	15 (-10 size, -1 Dexterity, +15 natural), touch -1, flat-footed 14
Base Attack/Grapple	+22/+40
Attack	Stamp +26 melee (5d8+15/19-20), or Tail slap +10 melee (2d8+7)
Full Attack	2 Stamps +28 melee (5d8+15/19-20), or Tail slap +10 melee (2d8+7)
Space/Reach	55 ft./50 ft.
Special Attacks	Trample 10d8+22
Special Qualities	Damage reduction 6/- (from Damage Reduction feats), Low-Light Vision, Scent, Basal Bellow
Saves	Fort +28, Ref +16, Will +14
Abilities	Strength 40, Dexterity 8, Constitution 29, Intelligence 2, Wisdom 14, Charisma 12
Skills	Intimidate +3, Listen +15, Spot +27
Feats	Alertness, Damage Reduction (x2), Diehard, Endurance, Epic Toughness, Great Fortitude, Improved Critical (stamp), Iron Will, Skill Focus (Spot), Improved Overrun
Environment	Warm and temperate forests, hills, & marsh
Organization	Solitary, pair or pod (3-18)
Challenge Rating	13
Treasure	None
Alignment	Always neutral
Advancement	31-60 HD (Colossal+)
Level Adjustment	–

Combat

A sauroposeidon is most likely to use its front claws for uprooting trees, but when attacked by something large enough to concern it (usually a rival male during mating season), it can use them to deadly effect. Against most dangers, it simply walks over them or uses its secondary attack with its lashing tail. Outside of its stationary attacks, it often utilizes its Trample and Improved Overrun. If untrained, it uses its Basal Bellow to warn others of its pod; trained sauroposeidon will use it as intended – as a call, signal, or to Intimidate smaller creatures.

The stamps of a sauroposeidon are considered to be bludgeoning and slashing weapons for the purposes of overcoming damage reduction.

Trample (Ex): A sauroposeidon can literally run over any creatures in its way that are of Gargantuan or smaller size. Creatures trampled must make a Reflex save (DC 39 half) or take 10d8+22 damage. The save DC is Strength-based.

Sauroposeidon as Animal Companions

A sauroposeidon makes an appropriate animal companion for a druid of at least ??th level.

Sauroposeidon as Improved Familiars

Characters with the Improved Familiar feat may choose sauroposeidon Sauroposeidon grants its master a +4 on Fortitude Saves.

Dinosaur, Warbeast Sauroposeidon
Colossal+ animal
Hit Dice	31d8+9*31+Feats (85 hp)
Initiative	-1
Speed	50 ft. (10 squares)
Armor Class	15 (-10 size, -1 Dexterity, +15 natural), touch -1, flat-footed 14
Base Attack/Grapple	+22/+40
Attack	Stamp +26 melee (5d8+15/19-20), or Tail slap +10 melee (2d8+7)
Full Attack	2 Stamps +28 melee (5d8+15/19-20), or Tail slap +10 melee (2d8+7)
Space/Reach	55 ft./50 ft.
Special Attacks	Trample 10d8+22
Special Qualities	Damage reduction 6/- (from Damage Reduction feats), Low-Light Vision, Scent, Basal Bellow, Combative Mount
Saves	Fort +28, Ref +16, Will +14
Abilities	Strength 43, Dexterity 8, Constitution 32, Intelligence 2, Wisdom 16, Charisma 12
Skills	Intimidate +3, Listen +15+1, Spot +27+1
Feats	Alertness, Damage Reduction (x2), Diehard, Endurance, Epic Toughness, Great Fortitude, Improved Critical (stamp), Iron Will, Skill Focus (Spot), Improved Overrun
Environment	Warm and temperate forests, hills, & marsh
Organization	Solitary, pair or pod (3-18)
Challenge Rating	14
Treasure	None
Alignment	Always neutral
Advancement	31-60 HD (Colossal+)
Level Adjustment	–

Wild sauroposeidon can be trained to be domesticated with a two-month training (Handle Animal DC 20) to develop proper usage as a signaller or watchful sentinel.

Warbeasts are trained for a 3-month period of rigorous testing that works on their physical abilities as well as their usefulness with combative riders and with apparel oriented for war (barding and armors), and Diplomacy (color guard, performance, and bannery). A wild, undomesticated sauroposeidon reared for one full year (Handle Animal DC 20 + HD of the animal) qualifies for this further warbeast training. Two months of warbeast training (Handle Animal DC 25 + HD of the warbeast) bestows the benefits and value as a trained mount for combat and show.

Market Price: Warbeast Sauroposeidon are sold on exotic markets and interplanar caravans for (75*31)+100gp. Most commonly these are found being distributed by Mercanes and similarly notorious extraplanar merchants.