There have been at least 70 Nemesis in the world at once which right now we have about the same amount which is 61 so they aren't common to see but the common thing that all cases involving a Nemesis include one thing which is the heart symbol on there head which indicates that they are man made or more of Robot made. These Robots have the strength to destroy villages as I have learned before but the strongest one has the power to destroy a town and they aren't ever really fast in most cases they are at best a fast as a car on a highway and they are usually very tall usually over 10 ft that is all the basic information about Nemesis.