Luring is a skill that can help keep your towers standing. If your opponent is using troops that target other troops over towers, you can use cheap units to draw them away. First, you must be able to recognize attacking units that will leave the tower to chase your lure troops. Next, practice spawning your lure units to learn how close they must be in order to get the attention of the attackers. When possible, select lure units that will go after enemy towers. That forces the distracted attackers to chase down your units before engaging them.