Type: Trait
Source: Unearthed Arcana
You are fast, but less sturdy than average members of your race.
Benefit: Your base land speed increases by 10 feet (if you don't have a land speed, apply the benefit to whichever of your speeds is highest). Drawback: Subtract 1 from your hit points gained at each level, including 1st (a result of 0 is possible).
Special: You must have a Constitution of 4 or higher to select this trait.