Birthsigns have been extensively overhauled with unique scripted effects. Each sign has a Greater Power as well as a passive ability.

Requires Av Latta Magicka, its dependencies, and the main DLCs.

Feel free to comment suggestions, report bugs, etc.  

ToDoList :

• Figure out more interesting abilities for Lady, Steed, Serpent, and Lover.

The Warrior
Those under the sign of the Warrior are mighty and brave.
(Passive) Warwyrd - Increase strength and endurance by 10. Power Attacks deal 10 extra damage and grant 50% shield for their duration.
(Greater Power) Battle Rage - Enter a rage, boosting Health, Attack Damage, and fatigue regeneration, But once it ends, collapse from exhaustion.

The Lord
Those under the sign of the Lord are healthy and enduring.
(Passive) Trollkin - You passively regenerate (1+ 2% of your max HP) every two seconds, but you are weak to fire.
(Greater Power) Northern Wind - Release a blast of freezing wind, dealing cold damage in large area and launching your foes away from you.

The Lady
Those under the sign of the Lady are compassionate and steadfast.
(Passive) Grace - Increase your Endurance and Personality by 10. Regenerate additional fatigue over time.
(Greater Power) Lady's Breath - Rapidly regenerate fatigue for a time.

The Steed
Those under the sign of the Steed are swift.
(Passive) Swiftfoot - Increase your speed by 20.
(Greater Power) Sudden Dash - Massively boost your movement speed for a short time.

The Mage
Those under the sign of the mage are intelligent and willful.
(Passive) Wizardry - Increase your Magicka by 50 points. All spells are 10% stronger.
(Greater Power) Magicka Overflow - Rapidly Regenerate magicka and reduce spell costs for a time.

The Apprentice
Those under the sign of the apprentice are reckless prodigies.
(Passive) WIld Magic  - You have 100 extra points of magic, and all your spells are 10% stronger. However, All spells you cast have a 5% chance of causing a random side effect to you; These include positive and negative effects.
(Greater Power) Chaos Surge - For 30 seconds, increase the power of all spells by 40%, but also increase the chance of wild magic to 15%

The Atronach
Those under the sign of the atronach are natural sorcerers.
(Passive) Wombburn - You have 150 extra magicka and 50% spell absorption, but you don't regenerate magicka.
(Greater Power) Atronach's Wrath - Release a wave of power, dealing 50 points of Shock Damage and absorbing magicka over time.

The Ritual
Those under the sign of the ritual are faithful and blessed.
(Passive) Healer's Gift - All of your healing magic is increased by 40%, and you gain 50% resistance against disease, poison, and paralysis.
(Greater Power) Blessed Word - Cleanse yourself of magic and turn away undead and summoned creatures.

The Thief
Those under the sign of the Thief are naturally lucky.
(Passive) Critical Eye - Increase luck by 10. You have a luck-based chance to critically hit with power attacks and bows, dealing extra damage.
(Greater Power) Lucky Break - Increase your luck massively for a time.

The Lover
Those under the sign of the Lover are charming and beautiful.
(Passive) Natural Beauty - Increase your Personality by 20 points.
(Greater Power) Caress - Paralyze and charm a target with your touch.

The Shadow
Those under the sign of the shadow are naturally sneaky.
(Passive) Shadow Cloak - Sneaking drains magicka but automatically gives you a Chameleon effect.
(Greater Power) Moonshadow - Become Invisible.

The Tower
Those under the sign of the tower are steadfast guardians.
(Passive) Stonework - Fortify health 25 points. Reflect damage 25 points.
(Greater Power) Tower Warden - Taunt an enemy, forcing them to attack you and exposing them to physical and magical damage.

The Serpent
Those under the sign of the serpent are unusual. They are both blessed and cursed by the stars.
(Passive) Snakeblood - gain 50% poison resistance.
(Greater Power) Star Curse - Sacrifice health to inflict a deadly paralyzing poison.