Dallah Thaun’s Luck [Racial]

You can rely on a good dose of luck to get you through almost any scrape. Other halflings say the blessing of Dallah Thaun is upon you.

Prerequisites: Halfling, Cha 13.

Benefit: Once per day, you can opt to gain a +5 luck bonus on a single saving throw. However, if you use this ability, you gain a –⁠2 penalty on all other saving throws until sunrise the next morning.

Source: Races of the Wild, page 149.