You can attack twice instead of once whenever you take the Attack action on your turn. You can't use Blitz and use this feature on the same turn.
Extra Attack
Raw data
{
"name": "Extra Attack",
"level": 6,
"__prop": "subclassFeature",
"header": 2,
"source": "ValdaSpire24Extras",
"entries": [
"You can attack twice instead of once whenever you take the {@action Attack|XPHB} action on your turn. You can't use Blitz and use this feature on the same turn."
],
"className": "Captain",
"classSource": "ValdaSpire24",
"subclassSource": "ValdaSpire24Extras",
"subclassShortName": "Star-Spangled Banner"
}