Quick( Unearthed Arcana, p. 89)
You are fast, but less sturdy than average members of your race.
Your base land speed increases by 10 feet (if you don't have a land speed, apply the benefi t 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).
You must have a Constitution of 4 or higher to select this trait. Roleplaying Ideas: Characters with this trait typically try to stay away from physical combat, but a rare few might relish it, striving to see if their superior speed is enough to best hardier warriors.