Sources
CR
Type
Size
Alignment
Movement

Aerosaur

Gargantuan Monstrosity (dinosaur), Unaligned

Armor Class 14 (natural armor)
Hit Points 155 (10d20 + 50)
Speed 20 ft., fly 120 ft.
STR
26
+8
DEX
10
+0
CON
21
+5
INT
3
-4
WIS
10
+0
CHA
5
-3
Skills Perception +4
Senses passive Perception 14
Languages
Challenge 10 (5,900 XP)

Traits

Magic Resistance. The aerosaur has advantage on saving throws against spells and other magical effects.

Actions

Multiattack. The aerosaur makes one Bite attack and one Talons attack.

Bite. Melee Weapon Attack: +12 to hit, reach 10 ft., one target. Hit:27 (3d12 + 8) piercing damage. If the target is a Huge or smaller creature, it has the grappled condition (escape DC 18). Until this grapple ends, the target has the restrained condition, and the aerosaur can't Bite another target.

Talons. Melee Weapon Attack: +12 to hit, reach 10 ft., one target. Hit:24 (3d10 + 8) slashing damage.

Wing Gusts (Recharge 5–6). The aerosaur beats its wings, creating bursts of thunderous force. Each creature within 10 feet of the aerosaur must make a DC 20 Strength saving throw. On a failed save, a creature takes 38 (7d10) thunder damage, is pushed up to 30 feet horizontally from the aerosaur, and has the prone condition. On a successful save, a creature takes half as much damage and is pushed up to 15 feet horizontally from the aerosaur.

Lore

When Annam's children first began to populate the worlds of the Material Plane, the All-Father created behemoth dinosaurs to live alongside them as companions. The primeval magic used to create the dinosaurs still thrums through their being and manifests in colorful, scar-like lines on their towering bodies. Some of these ancient dinosaurs persist in timeless jungles, hidden enclaves, and other lands untouched by the rest of the world.