Your body thrives in the throes of battle, growing stronger as your vitality wanes. For every quarter (25%) of your total hit points you have missing, you gain a +1 bonus to Strength (to a maximum of 24) and your movement speed doubles.

Effects:

•When you are above 75% of your total HP, you have no additional benefits.

•When you are between 50% and 74% HP, you gain +1 Strength, and your movement speed is doubled.

•When you are between 25% and 49% HP, you gain +2 Strength, and your movement speed is doubled.

•When you are below 25% HP, you gain +3 Strength, and your movement speed is doubled.

Restrictions & Interactions:

•This trait does not stack with magical or class-based increases to Strength that exceed the normal ability score cap of 24.

•If you receive healing that moves you into a higher HP threshold, you lose the corresponding Strength bonus.

•The speed-doubling effect applies only to your base movement speed and does not stack with effects such as Haste but does stack onto itself.

•If your Strength modifier changes as a result of this trait, adjust your attack and damage rolls accordingly.

Flavor:

Your species has evolved to fight harder when wounded, drawing power from adversity. Whether through heightened adrenaline, a supernatural berserker instinct, or an innate magical force within your blood, your might increases as your survival hangs in the balance. Warriors of your kind are known for their reckless endurance and explosive speed, striking with terrifying strength as they teeter on the brink of death.

you being an Aetherian you’ve being bread for battling and strength, you have permanent advantage to all and every Intimidation and Athletics rolls

Once per short rest, when an enemy makes an attack roll against you, you can use your reaction to impose disadvantage on the attack as you react with inhuman speed, Your Imposing presence lowering their hit chance

Aetherians resist control but are vulnerable to their own ambition. You have advantage on saving throws against being charmed, but if you fail a Wisdom saving throw against domination or mind control, the effect lasts one extra round, as your powerful will is turned against you.

Aetherians such as yourself struggle to take orders from those they see as weaker. You have disadvantage on all Persuasion checks when trying to convince someone of equal or lesser strength to lead or command you. both you and the person trying to persuade you roll Strength and if they role lower then you they gain disadvantage on the roll.

Every single level gained you get one more permanent Hit-Point to your max Hit-Points because of your warrior origins

Aetherians push themselves beyond their limits. If you end a combat encounter with less than half your HP, you must succeed on a DC 12 Constitution save or gain one level of exhaustion due to the extreme strain you put on your body.

Aetherians rely on discipline and structured combat but struggle to adapt to unpredictable situations. When an enemy successfully surprises them (such as an unseen attack, an unexpected strategy, or a major battlefield shift), they must make an Intelligence saving throw (DC 12 + half their level). On a failure, they suffer a -2 penalty to all attack rolls and Dexterity saving throws for 1 minute as they struggle to recalibrate their tactics.

Aetherians are mentally wired for battle, making it difficult for them to operate outside of combat. They suffer disadvantage on Wisdom (Insight) and Charisma (Deception, Persuasion) checks in non-combat situations unless the conversation revolves around warfare, tactics, or strength.

Aetherians for millenniums. Aetherians reach maturity really quickly on a bit quicker then humans do and lasting up to 7000 years old.

You gain Heroic Inspiration whenever you finish a Long Rest.

You gain proficiency in one skill of your choice.

You gain an Origin feat of your choice.