Boon of Magical Secrets (5e Epic Boon)
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Boon of Magical Secrets
You learn two new spells from any spell list and can cast them using your spellslots. The spells must be of a level for which you have spellslots. When you first learn these spells, you choose either Intelligence, Wisdom, or Charisma to use when casting these spells. The spells you learn this way have a spell save DC of 8 + your proficiency bonus + the chosen ability score's modifier, and a spell attack bonus of your proficiency bonus + the chosen ability score's modifier.