You can cast any spell you know or have prepared without expending a spell slot. Once you do so, you can't use this boon again until you finish a long rest.
Boon of Spell Recall
RewardDMGp. 2322014
Raw data
{
"name": "Boon of Spell Recall",
"page": 232,
"type": "Boon",
"__prop": "reward",
"source": "DMG",
"entries": [
"You can cast any spell you know or have prepared without expending a spell slot. Once you do so, you can't use this boon again until you finish a long rest."
],
"reprintedAs": [
{
"tag": "feat",
"uid": "Boon of Spell Recall|XPHB"
}
]
}