Talk:Harvester/@comment-24324247-20140118124015/@comment-24324247-20140119030143

but I see someone fighting him @wave 18 or higher in youtube, which means you never know when it will come. It makes the farming in def harder. (and you know most people only play def/sur missions)

Or is every 5-waves considered as another 'mission' that you can have another chance to spawn it?