After spending a Long Rest in your Bastion, you gain a magical Charm (see "Supernatural Gifts" in chapter 3) that lasts for 7 days or until you use it. The Charm allows you to cast Heal once without expending a spell slot. You can't gain this Charm again while you still have it.
Sanctum Charm
RewardXDMGp. 3462024
Raw data
{
"name": "Sanctum Charm",
"page": 346,
"type": "Charm",
"__prop": "reward",
"source": "XDMG",
"entries": [
"After spending a {@variantrule Long Rest|XPHB} in your {@book Bastion|XDMG|7}, you gain a magical Charm (see \"{@book Supernatural Gifts|XDMG|2|Supernatural Gifts}\" in {@book chapter 3|XDMG|2}) that lasts for 7 days or until you use it. The Charm allows you to cast {@spell Heal|XPHB} once without expending a spell slot. You can't gain this Charm again while you still have it."
],
"additionalSpells": [
{
"innate": {
"_": {
"limited": {
"1": [
"heal|xphb"
]
}
}
}
}
]
}