Dreaming of a serpent often symbolizes transformation, healing, or hidden fears and desires. In your dream, the serpent moving just beneath the surface could represent something lurking in your subconscious that you may be trying to confront. The act of trying to hit it with a hammer suggests a desire to tackle these issues forcefully, but your initial lack of success might indicate feelings of frustration or powerlessness in dealing with them.

The appearance of the Valkyrie, a figure from Norse mythology known for choosing those who may die and those who may live in battle, adds a significant layer to your dream. It may symbolize guidance, protection, or the assistance of a higher power in overcoming your struggles. The light that struck the serpent could represent clarity or enlightenment, suggesting that you may soon gain insight that will help you deal with your challenges.

Overall, this dream could be encouraging you to confront your fears or hidden issues with the awareness that you are not alone in your struggle. Embrace the support around you, whether it's from friends, family, or even your own inner strength. Consider reflecting on what the serpent may represent in your life and how you might seek assistance in addressing it.