Note that the Derro presented in Underworld Player's Guide includes various subraces which replace the Constitution Ability Score Increase and the Insanity trait. The subraces were not declared OGL, so this page largely describes only the Unlikely Heroes version of the Derro race.

Derro Traits

Your derro character has certain characteristics in common with all other derro.

Ability Score Increase. Your Dexterity score increases by 2, and your Constitution score increases by 1.

Age. Derro reach maturity by the age of 15 and live to be around 75.

Size. Derro stand between 3 and 4 feet tall with slender limbs but wide shoulders. Your size is Small.

Alignment. Their naturally unhinged minds are nearly always chaotic, and many but not all are evil.

Speed. Derro are fast for their size. Your base walking speed is 30 feet.

Superior Darkvision. Accustomed to life underground, you can see in dim light within 120 feet of you as if it were bright light, and in darkness as if it were dim light. You can’t discern color in darkness, only shades of gray.

Insanity. You have advantage on saving throws against being charmed or frightened.

Eldritch Resilience. You have advantage on Constitution saving throws against spells.

Sunlight Sensitivity. You have disadvantage on attack rolls and Wisdom (Perception) checks that rely on sight when you, the target of your attack, or whatever you are trying to perceive is in direct sunlight.

Languages. You can speak, read, and write Dwarvish and your choice between Common and Undercommon.

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