GM's will spawn monsters according to the people's level. Like say you have a group of 4 players and their levels are 20, 40, 60, 80. People who are those level's get 10 monsters each ( within their level's ) and see who can kill them the fastes. First person who kills all of their monsters, should get like 500k of zulies. Sorry if i don't explain it right, but im hoping you guys will get the point.