Derro

Ability Score Adjustments: +2 Constitution, -2 Charisma. Derro are somewhat unappealing, but they are quite hardy, much like their dwarven cousins.
Medium-size: As Medium-size creatures, derro have no special bonuses or penalties due to size.
Speed: Derro base speed is 30 feet.
Darkvision: Derro have darkvision up to 30 feet.
Stonecunning: Derro receive a +2 racial bonus to checks to notice unusual stonework. Non-stone objects that are disguised as stone also count as unusual stonework. A derro who comes within 10 feet of unusual stonework can make a check as though actively searching and can use the Search skill to find stonework traps as a rogue can. A derro can also intuit depth, sensing the approximate distance underground.
Gravity Sense: Derro are unusually sensitive to gravity. With a simple Spot check (DC 10) they can tell you exactly what the local gravity is. If the check fails, they can still get within 10% (high or low, at the DM’s discretion). With a similar Spot check (DC 10), a derro can discern the direction of the strongest gravitational pull affecting them at any given time, even in the dead of space.
Racial Bonus: +1 racial bonus to attack rolls against orcs and goblinoids.
Racial Bonus: +2 racial bonus to Will saves against spells and spell-like abilities.
Racial Bonus: +2 racial bonus to Appraise checks and Craft or Profession checks that are related to stone or metal.
Racial Bonus: +2 racial bonus to Fortitude saves against all poisons.
Racial Bonus: +4 dodge bonus against giants.
Resistance To Magic: Derro are highly resistant to magic, with a natural spell resistance of 18.
Sunlight Vulnerability (Ex): Derro take 1 point of temporary Constitution damage for every hour they are exposed to sunlight, dying when their Constitution reaches 0. Lost Constitution points are recovered at the rate of 1 per day out of the sun.
Blind Fighting: All Derro receive the Blind-Fight feat in addition to the feat all characters receive at 1st level.
Automatic Languages: Dwarven and Undercommon. Bonus Languages: Dwarven.
Favored Class: Fighter. A multiclass derro’s fighter class does not count when determining whether or not there is an XP penalty for multiclassing (see PHB, Chapter 3, Experience for Multiclass Characters). Like their cousins the dwarves, derro are sturdy warriors.
Level Equivalent: +1