{
  "class": {
    "index": "wizard",
    "name": "Wizard",
    "url": "/api/2014/classes/wizard"
  },
  "desc": [
    "At 18th level, you have achieved such mastery over certain spells that you can cast them at will. Choose a 1st-level wizard spell and a 2nd-level wizard spell that are in your spellbook. You can cast those spells at their lowest level without expending a spell slot when you have them prepared. If you want to cast either spell at a higher level, you must expend a spell slot as normal.",
    "By spending 8 hours in study, you can exchange one or both of the spells you chose for different spells of the same levels."
  ],
  "index": "spell-mastery",
  "level": 18,
  "name": "Spell Mastery",
  "prerequisites": [],
  "updated_at": "2026-04-01T20:35:37.430Z",
  "url": "/api/2014/features/spell-mastery"
}