Trait bonuses do not stack-they’re intended to give player characters a slight edge, not a secret backdoor way to focus all of a character’s traits on one type of bonus and thus gain an unseemly advantage.

Many traits grant a new type of bonus: a “trait” bonus.

Alternatively, if you’ve already got a background in your head or written down for your character, you can view picking his traits as a way to quantify that background, just as picking race and class and ability scores quantifies his other strengths and weaknesses. Think of character traits as “story seeds” for your background after you pick your two traits, you’ll have a point of inspiration from which to build your character’s personality and history. Yet a character trait isn’t just another kind of power you can add on to your character-it’s a way to quantify (and encourage) building a character background that fits into your campaign world. At its core, a character trait is approximately equal in power to half a feat, so two character traits are roughly equivalent to a bonus feat. They can enhance your character’s skills, racial abilities, class abilities, or other statistics, enabling you to further customize him. Character traits are abilities that are not tied to your character’s race or class.

The darkest dungeon alchemy table