Your base Armor Class equals 10 plus your Dexterity and Charisma modifiers.
Unarmored Defense
Raw data
{
"name": "Unarmored Defense",
"page": 64,
"level": 3,
"__prop": "subclassFeature",
"header": 2,
"source": "XPHB",
"entries": [
"Your base {@variantrule Armor Class|XPHB} equals 10 plus your Dexterity and Charisma modifiers."
],
"className": "Bard",
"classSource": "XPHB",
"subclassSource": "XPHB",
"subclassShortName": "Dance"
}