Mercy shown or asked for is read as forgiveness and the softening of judgement. Dream books link it to a harsh standard — toward others or yourself — that is ready to ease.
When this appeared in your dream, what were you feeling?
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.