Land of Monsters

In a foreign realm, a place called the Land of Monsters, ancient beasts open tears between planes of realities, and step through to cause chaos and destruction. Sometimes, they will appear in populated areas, causing most people to stay indoors whenever they can. When that happens, it's up to trained wizards to subdue them, and send them back to their reality. If they fail, or get taken by surprise, they risk being killed, or worse captured and brought back to a place ruled by unspeakable horrors...