As a Bonus Action, you can discern certain strengths and weaknesses of a creature you can see within 30 feet of yourself; you know whether that creature has any Immunities, Resistances, or Vulnerabilities, and if the creature has any, you know what they are.
Once you use this feature, you can't do so again until you finish a Long Rest. You can also restore a use of the feature by expending one Superiority Die (no action required).
{
"name": "Know Your Enemy",
"page": 94,
"level": 7,
"__prop": "subclassFeature",
"header": 2,
"source": "XPHB",
"entries": [
"As a {@variantrule Bonus Action|XPHB}, you can discern certain strengths and weaknesses of a creature you can see within 30 feet of yourself; you know whether that creature has any Immunities, Resistances, or Vulnerabilities, and if the creature has any, you know what they are.",
"Once you use this feature, you can't do so again until you finish a {@variantrule Long Rest|XPHB}. You can also restore a use of the feature by expending one Superiority Die (no action required)."
],
"className": "Fighter",
"classSource": "XPHB",
"subclassSource": "XPHB",
"subclassShortName": "Battle Master"
}