Horned serpents appear in many Native American traditions as powerful water beings. Dream books read them as raw power that can heal or harm, depending on how it is approached.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.