Magnitude 8 is an enemy ability used by Hill Gigas, Oceanus, Angler Whelk, Landworm, Abyss Worm, Earth Dragon, Omega Weapon, Visage, Gorgimera, Ultros (3rd), Antares, Number 024, Crane (Left), Crane (Right). It inflicts Earth-elemental damage to the party with a spell power of 100, hit rate of 130, and a cost of 20 MP.
Magnitude 8 refers to the Richter magnitude scale that assigns a magnitude number to quantify the energy released by an earthquake. A magnitude 8 earthquake will cause major damage to buildings. It will cause damage in large areas and felt in extremely large regions.