The flint in a dream signifies an important and decisive moment in your life. It indicates that an opportunity is offered to you where you can take the lead.
A flint denotes a creative spark as well as an energy that you need to ignite. It also indicates your inner desire to find new ways of doing things or new ways of living your life.
If you are experiencing difficulty in carrying out something which requires a lot of creativity, like writing or drawing, it could be that this dream is reminding you not to abandon your creativity and see what happens if we just try taking the risk for once.