Warlock | Pillars of Eternity 2 Wiki

 Conjurer

 Bonus: Gain +1 Power Level with Conjuration Spells.
Gain "Conjure Familiar" spell: Summons a helpful creature to aid the wizard. Familiars are poor at combat, but provide passive bonuses to their master.

 Penalty: Lose access to spells from Evocation and Illusion schools.
+20% Recovery Time for Wizard Spells not of the Conjuration School.

Enchanter

 Bonus: +1 Power Level with Enchanting Spells.
Gain "Free Action" passive: Once per encounter, when the wizard is affected by a Dexterity Affliction, they will clear that effect and become temporarily immune to Dexterity Afflictions.

 Penalty: Lose access to spells from Illusion and Transmutation schools.
+20% Recovery Time for Wizard Spells not of the Enchanting School.

  Transmuter

 Bonus: +1 Power Level with Transmutation Spells.
Gain "Form of the Fearsome Brute" spell: Transforms the wizard into an Ogre. While in this form, spells are disabled, but physical attributes are increased.

 Penalty: Lose access to spells from Enchanting and Evocation schools.
+20% Recovery Time for Wizard Spells not of the Transmutation School.

  Evoker

 Bonus: +1 Power Level with Evocation Spells.
Your evocation spells have a small chance to "echo", reapplying their damage and effects to their targets again, instantly.

 Penalty: Lose access to spells from Transmutation and Conjuration schools.
+20% Recovery Time for Wizard Spells not of the Evocation School.

  Illusionist

 Bonus: +1 Power Level with Illusion Spells.
Gain "Reflexive Mirror" passive: Once per encounter, when first attacked, automatically gain the effects of the spell "Mirrored Images".

 Penalty: Lose access to spells from Conjuration and Enchanting schools.
+20% Recovery Time for Wizard Spells not of the Illusion School.

 Berserker

Bonus:  Tenacious (+5 Might, + 2 Penetration) and  Hardy (+5 Constitution, + 2 Armor Rating) are the Inspirations. 
This replaces   Strong (+5 Might) and  Fit (+5 Constitution) Inspirations.
Gaint 30% Hit to Crit conversion on melee and carnage attacks while frenzied.

Penalty:  Confused status inflicts -5 Intellect and turns all Carnage attacks into Friend or Foe, resulting in friendly fire. 
Players also take Raw Damage at the rate of 2 Raw Damage every 3 seconds for 15 seconds, -10 Deflection. Cannot see Health when frenzied.

 Corpse-Eater

Bonus: Gain the Ability Flesh Communion, target a hostile deceased  Kith, Wilder or Beast to devour their corpses.
Flesh Communion also heals for 50 Health and grants +3 Rage and Barbarian Resources.

Penalty: All Rage abilities increase in cost by 1.

 Mage Slayer

Bonus: Successful melee weapon attacks (or Carnage Hits) add Spell Disruption to the target, causing wizard, priest, druid, cipher, or chanter spells to have a chance to fail when cast. Gain +5% resistance against Spells.

Penalty: Cannot use Potions or Scrolls, -50% beneficial effect duration. Passive Spell Resistance affects Friendly and hostile spells.