The herculomnom is a powerful omnom. It is made from any omnom beetle with enough nutrients to create one. These are a must for dealing with early heroes as once one evolves into a beetle he will rapidly create around 3 other herculomnom. They are very good nutrition for lizardmen aswell, just keep their population in check. Once you have ONE herculomnom make sure he survives to evolve into a beetle or else you are missing a chance to get a powerful horde of bugs.