Now I don't mind cliches, but I know some people do. I have a plot idea, and want to ask if it is too cliche. If it is, then how I could change it to make it less "done before a thousand times". My characters get called to a portal to another world with mythological beings. The one who calls them tells of an invasion from the underground by monsters and corrupt individuals. That's the basic gist. What do you think?