Starting at 15th level, you can run down your foes, whether you're mounted or not. If you move at least 10 feet in a straight line right before attacking a creature and you hit it with the attack, that target must succeed on a Strength saving throw (DC 8 + your proficiency bonus + your Strength modifier) or be knocked prone. You can use this feature only once on each of your turns.
Ferocious Charger
Raw data
{
"name": "Ferocious Charger",
"page": 30,
"level": 15,
"__prop": "subclassFeature",
"header": 2,
"source": "XGE",
"entries": [
"Starting at 15th level, you can run down your foes, whether you're mounted or not. If you move at least 10 feet in a straight line right before attacking a creature and you hit it with the attack, that target must succeed on a Strength saving throw ({@dc 8} + your proficiency bonus + your Strength modifier) or be knocked {@condition prone}. You can use this feature only once on each of your turns."
],
"className": "Fighter",
"classSource": "PHB",
"subclassSource": "XGE",
"subclassShortName": "Cavalier"
}