Beginning at 9th level, you can reroll a saving throw that you fail. If you do so, you must use the new roll, and you can't use this feature again until you finish a long rest.
You can use this feature twice between long rests starting at 13th level and three times between long rests starting at 17th level.
{
"srd": true,
"name": "Indomitable",
"page": 72,
"level": 9,
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"entries": [
"Beginning at 9th level, you can reroll a saving throw that you fail. If you do so, you must use the new roll, and you can't use this feature again until you finish a long rest.",
"You can use this feature twice between long rests starting at 13th level and three times between long rests starting at 17th level."
],
"className": "Fighter",
"basicRules": true,
"classSource": "PHB"
}