When you cast a spell that has a duration of 1 minute or longer, you can spend 1 Sorcery Point to double its duration to a maximum duration of 24 hours.
If the affected spell requires Concentration, you have Advantage on any saving throw you make to maintain that Concentration.
{
"name": "Extended Spell",
"page": 142,
"srd52": true,
"__prop": "optionalfeature",
"source": "XPHB",
"entries": [
"When you cast a spell that has a duration of 1 minute or longer, you can spend 1 Sorcery Point to double its duration to a maximum duration of 24 hours.",
"If the affected spell requires {@status Concentration|XPHB}, you have {@variantrule Advantage|XPHB} on any saving throw you make to maintain that {@status Concentration|XPHB}."
],
"consumes": {
"name": "Sorcery Point",
"amount": 1
},
"featureType": [
"MM"
]
}