Question: I am writing a fantasy book about three prisoners across the world who start a rebellion. I have not decided if the rebellions attack each other when the main kingdom is destroyed, or if one of the prisoners goes evil or anything. I'm planning on adding many subplots and characters, who could be killed off, to add depth, but I am having trouble. Any advice? Answer:
Assuming your question is about cliches, the short answer is don't worry about them. There are few wholly original ideas. What matters is how you tell the story, your unique voice, and the unique characters you create.
Incidentally, killing characters isn't what adds depth, though it is a good idea to have costs along the way to show how determined your heroes are (because they push on despite the costs). What adds real depth, however, is the main character's inner conflict.
Best of luck.