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Yrthak CR 9

This flying reptile has large, leathery wings and a vibrantly colored crest on its horned, narrow-snouted head.

XP 6,400
N Huge magical beast
Init +3; Senses blindsight (sound) 120 ft.; Perception +22


EAC 22; KAC 24
Fort +13, Ref +13, Will +8
Immunities gaze attacks, visual effects and illusions, sight-based attacks, sonic
Weaknesses blind


Speed 20 ft., fly 60 ft. (average)
Melee bite +22 (2d10+15 P) or claw +22 (2d6+15 S)
Multiattack bite +16 (2d10+15 P) and 2 claws +16 (2d6+15 S)
Ranged sonic lance +19 (3d6+9 So)
Space 15 ft.; Reach 10 ft.
Offensive Abilities explosion


Str +6, Dex +3, Con +4, Int –2, Wis +2, Cha +1
Feats Mobility, Spring Attack
Skills Acrobatics +17, Athletics +17
Languages Draconic


Blind (Ex)

A yrthak sees and senses exclusively through its blindsight ability, which is based on sound and movement—beyond 120 feet, it is considered blinded. A deaf yrthak is effectively blinded as well except against adjacent foes—its weak eyesight functions enough for it to attack targets this close, although in such cases these creatures still gain the benefit of concealment“>concealment (20% miss chance) because of the creature’s poor vision. It is invulnerable to all sight-based effects and attacks, including gaze attacks.

Explosion (Ex)

As a standard action, a yrthak can fire its sonic lance at the ground, a large rock, a stone wall, or a similar nonmagical object within 60 feet to create an explosion. This attack deals 2d6 piercing damage to all within 10 feet of the effect’s center.

Sonic Lance (Ex)

A yrthak’s sonic lance has a maximum range of 60 feet and no range increment.


Environment temperate deserts, hills, or mountains
Organization solitary, pair, or clutch (3–6)

Swift, cunning, and perpetually ravenous, the yrthak terrorizes the barren wastelands in which it makes its home, swooping down from on high to blast prey with bursts of pure sound. Though technically blind, as its eyes are tiny and barely capable of vision beyond a few feet, the yrthak senses its surroundings via acute hearing and echolocation. While its powerful jaws and claws are equally capable of taking down opponents, the yrthak generally prefers to wheel through the sky on its membranous wings, firing bolt after bolt of sound into its prey, and exulting in the thrill of the hunt.

An adult yrthak is 20 feet long and weighs 1,500 pounds. Yrthaks spend most of their time aloft—a yrthak hunt often lasts several days, with the yrthak skimming roughly 100 feet over the ground in its wide-ranging search for live prey, only resorting to grazing on carrion in direst need. While they have near-human intelligence, yrthaks generally do not seem interested in forming societies of their own— although the sight of a clutch of yrthaks tormenting a captured morsel might seem to indicate otherwise.

Section 15: Copyright Notice

Alien Bestiary (Starfinder) © 2018, Legendary Games; Lead Designer: Jason Nelson. Authors: Anthony Adam, Kate Baker, John Bennet, Eytan Bernstein, Robert Brookes, Russ Brown, Duan Byrd, Jeff Dahl, Robyn Fields, Joel Flank, Matt Goodall, Robert J. Grady, Jim Groves, Steven T. Helt, Thurston Hillman, Tim Hitchcock, Nick Hite, Daniel Hunt, Mike Kimmel Marshall, Isabelle Lee, Jeff Lee, Lyz Liddell, Jason Nelson, Richard Pett, Tom Phillips, Alistair J. Rigg, Alex Riggs, Wendall Roy, Mike Shel, Neil Spicer, Todd Stewart, Russ Taylor, Rachel Ventura, Mike Welham, George Loki Williams, Scott Young.