When you use a spell slot to cast a spell, you can expend the Charm (no action required) to roll on the Wild Magic Surge table in the Player's Handbook.
Manifest Charm of Xoriat, the Realm of Delirium
RewardEFAp. 502024
Raw data
{
"name": "Manifest Charm of Xoriat, the Realm of Delirium",
"page": 50,
"type": "Charm",
"__prop": "reward",
"source": "EFA",
"entries": [
"When you use a spell slot to cast a spell, you can expend the Charm (no action required) to roll on the {@table Wild Magic Surge|XPHB|Wild Magic Surge table} in the {@book Player's Handbook|XPHB}."
]
}