NATO

NATO, also known as Summit, is an artificial being made up of extremely heavy armor. Its name derives from the supposed multi-nation origin of this armor, sometimes depicted in the form of flags that cover the creature. As all the flags come from the real world, the actual origin of this creature is unknown.

Though a NATO's armor is nigh-impenetrable, it often has a singular elemental weakness, frequently ice magic, that can be used to defeat it.