When you roll a 1 on an attack roll, ability check, or saving throw, you can reroll the die and must use the new roll.
Lucky
Raw data
{
"srd": true,
"name": "Lucky",
"page": 28,
"type": "entries",
"__prop": "raceFeature",
"source": "PHB",
"entries": [
"When you roll a 1 on an attack roll, ability check, or saving throw, you can reroll the die and must use the new roll."
],
"raceName": "Halfling (Lightfoot)",
"basicRules": true,
"raceSource": "PHB",
"_raceBaseName": "Halfling",
"_raceBaseSource": "PHB",
"_raceSubraceName": "Lightfoot"
}