Starting at 10th level, when you roll initiative and have no uses of Fighting Spirit remaining, you regain one use.
Tireless Spirit
Raw data
{
"name": "Tireless Spirit",
"page": 31,
"level": 10,
"__prop": "subclassFeature",
"header": 2,
"source": "XGE",
"entries": [
"Starting at 10th level, when you roll initiative and have no uses of Fighting Spirit remaining, you regain one use."
],
"className": "Fighter",
"classSource": "PHB",
"subclassSource": "XGE",
"subclassShortName": "Samurai"
}