Your talisman is an ornate or rustic magical weapon. This weapon takes the form of a dagger, short sword or any other one-handed melee weapon.(Examples: A black glass dagger, a silver longsword, a stone handaxe, a bone spear, a gleaming glove that produces a deadly blade, a barbed scourge.)
You are proficient with your athame, and you can add your Intelligence modifier to attack and damage rolls made with your athame. Over the course of a long rest, you can choose to change your athame into a different weapon.