Uncommon Traits are generally upgraded versions of common traits, but begin to include some defenses and resistances. Most Uncommon Traits are Minor Traits, but several can be Major Traits.

When you cast a spell that does Poison damage, its Save DC is increased by 1. (Trait Type: Minor, Trait
Somewhere in your previous existence, you fortified your mind against outward disturbances. You gain a bonus to Concentration checks equal
You have always been able to dodge a hit, from when you were a child dodging rocks, to now when
When you cast a spell that does Cold damage, its Save DC is increased by 1. (Trait Type: Minor, Trait