You were born with the ability yo know what is buried beneath your feet. You have worked for years alongside archaeologists, finding lost cities and ancient treasures. However, today is the first time you have ever said, "We should not dig here.
Others have commented the assassin is a time traveller. Time travel has nothing to do with it! Affect an unrelated thing in such a way that the knock on effect leads to the death of the intended victim.
Good questions for any fantasy writer. Knowing the details of how your version of magic works lets you understand better how it interacts with the characters and storyline. Loss of Magical abilities. can magic be lost?
You tossed your rent bill across the room in frustration and it went under your bed. A minute later, a grotesque claw pushed the bill back out with a wad of cash.<<< and then gently place a plate of cookies or something under the bed
Writing prompt alternative realities schizophrenia >>> Your grandfather had schizophrenia. He gave you his eyeglasses before he passed away as a remembrance. You recently discovered that you can see alternate realities as you wear them.