The core is usually a round creature with laser-shooting tentacles, but varies slightly in some games. In all Legion's appearances, it is defeated by knocking off chunks of the corpse ball to expose the core, and then finishing it off. Initially, it's main attack is simply dropping bodies at the player which then start walking around like zombies, but as pieces of it fall off the tentacles start shooting lasers, thus making Legion more dangerous as it becomes more vulnerable.