Lucky Skill (3.5e Feat)
From D&D Wiki
Lucky Skill [Racial, Luck]
A rabbit’s foot brings good luck, Thankfully for you, you have two.
Benefit: You may expend one luck reroll to automatically take 20 on a skill check, even if failing the check normally yields negative consequences (such as setting off a trap)
Special: You gain one extra luck reroll per day.