*Trickster's Dagger first appeared in the 5e Campaign Setting Adventurer's Agency.
Weapon (dagger), rare (requires attunement)
You gain a +1 bonus to attack and damage rolls made with this magic weapon. Once you attune to the trickster’s dagger, choose two cantrips from the wizard spell list. You can now cast these using Constitution as your spellcasting ability. When you complete a long rest, you may swap the wizard cantrips you know.