Thunder Wyrm (Ar tonelico II: Melody of Metafalica)

One of the strongest Dragon-type enemies, these creatures not only boast stats far higher than any of its predecessors: they also have a skill set that makes them a credible threat. These are Greased Lightning, in which they attack a party member once; Gathering Tornado, in which they whip up a windstorm that hits all party members once for Wind-elemental damage; and Blizzard, in which they hit all party members thrice for Ice-elemental damage. So it the player has to pay attention if they want to be able to minimize the large amount of damage they will be suffering against these monsters if they can't finish them off quickly.