Charm of the Slayer

D&D 2024 boon: Charm of the Slayer. Source: Dungeon Master's Guide (2024). boon type Charm One weapon in your possession becomes a Dragon Slayer or Giant Slayer (DM's choice) for the next 9 days. The Charm then vanishes from you, and the weapon returns to normal.

Source: Dungeon Master's Guide (2024), p. 99 - Licenses and attribution