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Boon of Spell Mastery
D&D 2014 boon: Boon of Spell Mastery. Source: Dungeon Master's Guide (2014). boon type Boon Choose one 1st-level sorcerer, warlock, or wizard spell that you can cast. You can now cast that spell at its lowest level without expending a spell slot.
Source: Dungeon Master's Guide (2014), p. 232 - Licenses and attribution