D&D has the Great Old One Pact for making an eldritch horror themed Warlock character, now it just needs one for all the other classes.
Barbarian- Path of the Creeping Fear
While raging, these barbarians evoke the terror of things that should not be. Their foes might not even recognize them in this state.
Bard- College of Horror
These bards collect the most fearful songs and stories they can find, though they must avoid losing themselves to the power of these stories.
Cleric- Madness Domain
The gods worshipped by these clerics not only cause but embody madness and the destruction of the mind.
Druid- Circle of the Void
These druids have visions of the impossible ecology of a world which both is and is not the same as their own.
Fighter- Writhing Torment Archetype
These long-lost techniques inflict terrible pain upon the opponent, both physically and mentally. Even allies must beware the fighter’s presence.
Monk- Way of the Endless Spiral
These monks use self-hypnosis as a path to what they call enlightenment, but some of them seem to obey a will that is not their own.
Paladin- Oath of Hunger
Under this oath, paladins relentlessly bring about the slow decay and degradation of all they consider unworthy.
Ranger- Rediscoverer Archetype
These rangers focus on the past, searching for forgotten lore they can turn to their advantage, though they risk unleashing powers greater than themselves.
Rogue- Dimension Shifter Archetype.
These rogues have become so unnaturally dexterous, they can slip through the grasp of reality itself. Some vanish and never reappear.
Sorcerer- Far Kind Origin
Descended from or corrupted by beings of the unknowable Far Realms, these sorcerers command bizarre forces not even they can comprehend.
Wizard- School of Numerology
Regarding their studies as the purest form of wizardry, these wizards inevitably discover mathematical truths about the cosmos that fill them with dread.
