Boon of Fortune's Favor

Boon of Fortune's Favor
Feat
Prerequisite: Level 19

You gain the following benefits.
Saving Throw Reroll.
When you fail a saving throw, you can reroll it and must use the new roll. Once you use this benefit, you can't do so again until the start of your next turn.

Source: Forgotten Realms: Heroes of Faerûn (FRHoF), page 43