Gargantuan Beast (Dinosaur), Unaligned
AC 17 (natural armor)    Initiative −1 (9)
HP 230 (20d20 + 80)
Speed 40 ft.
Mod Save
STR 26 +8 +13
DEX 8 −1 −1
CON 19 +4 +4
Mod Save
INT 2 −4 −4
WIS 14 +2 +7
CHA 12 +1 +1
Skills Perception +7
Resistances Bludgeoning, Piercing, and Slashing from Nonmagical Attacks
Immunities Frightened
Senses Passive Perception 17
Languages —
CR 13 (XP 10,000; PB +5)
Traits

Beastlands Instinct. While on natural terrain, the brachiosaurus has advantage on Wisdom (Perception) and Wisdom (Survival) checks.

Colossal Presence. Creatures of Large size or smaller that start their turn within 20 feet of the brachiosaurus must succeed on a DC 16 Wisdom saving throw or become frightened until the start of their next turn.

Siege Creature. The brachiosaurus deals double damage to objects and structures.

Thunderous Stride. The ground within 15 feet of the brachiosaurus is difficult terrain for hostile creatures.


Actions

Multiattack. The brachiosaurus makes two attacks: one with its Stomp and one with its Tail.

Stomp. Melee Weapon Attack: +13 to hit, reach 15 ft., one target.
Hit: 27 (3d12 + 8) bludgeoning damage.
If the target is Huge or smaller, it must succeed on a DC 18 Strength saving throw or be knocked prone.

Tail Sweep. Melee Weapon Attack: +13 to hit, reach 20 ft., one target.
Hit: 25 (3d10 + 8) bludgeoning damage.

Earthshaking Advance (Recharge 5–6).
The brachiosaurus moves up to half its speed. Each creature within 15 feet of it during this movement must make a DC 18 Dexterity saving throw, taking 36 (8d8) bludgeoning damage on a failed save, or half as much on a successful one. A creature that fails the save is knocked prone.

Actions

Multiattack. The brachiosaurus makes two attacks: one with its Stomp and one with its Tail.

Stomp. Melee Weapon Attack: +13 to hit, reach 15 ft., one target. Hit: 27 (3d12 + 8) bludgeoning damage. If the target is Huge or smaller, it must succeed on a DC 18 Strength saving throw or be knocked prone.

Tail Sweep. Melee Weapon Attack: +13 to hit, reach 20 ft., one target. Hit: 25 (3d10 + 8) bludgeoning damage.

Earthshaking Advance (Recharge 5–6). The brachiosaurus moves up to half its speed. Each creature within 15 feet of it during this movement must make a DC 18 Dexterity saving throw, taking 36 (8d8) bludgeoning damage on a failed save, or half as much on a successful one. A creature that fails the save is knocked prone.

Description

Rising 13 meters into the air and stretching 19 meters from snout to tail, the brachiosaurus of the Beastlands is a walking monument to primal grandeur. Its towering forelimbs elevate its long neck high above the canopy, allowing it to browse treetops few creatures can reach. Most predators give it a wide berth; even the boldest carnivores hesitate before challenging such immense mass.

Where a skyreach colossus wanders, the wilderness seems to part in reverence.

Behavior & Ecology

Brachiosaurus herds are rare but awe-inspiring. Most travel alone or in pairs, feeding on high canopy foliage and stripping entire treetops in a single stretch. Their immense size deters most threats, and they rarely respond aggressively unless harassed persistently.

In the Beastlands, some celestials view them as living embodiments of steadfastness and natural authority.


Habitats (Beastlands Only)

  • Vast Primeval Forest Canopies

  • High-Tree Savannah Regions

  • River Valley Megaforests

  • Ancient Grove Heartlands

  • Rolling Highland Woodlands


Variant: Ancient Skyfather

An exceptionally old brachiosaurus with thickened hide and immense endurance.

  • Increase HP to 280.

  • Gains Regenerative Vitality: Regains 10 hit points at the start of its turn if it has at least 1 hit point.

  • Colossal Presence DC increases to 18.

Monster Tags: Dinosaur

Habitat: DesertForestGrasslandHillPlanar (Beastlands)

Treasure:  None

WilliamTaylor7652

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