Revenge

A land enemy that upon bieng hit by progectile based towers, will return a very small portion of the damage back to it (the % returned depending on level) and it has slightly more health than average too making non progectile weapons more useful also progectiles with splash effects will get that returned to them also dealing splash on the towers and if the tower that kills it fires a progectile, it will return that exept a much larger portion of the damage back as a final piece of revenge (the damage returned can be over 50%) it gives 10 credits for killing (+5 per level)