Siren Era: Scale Abyss

An alien passage suddenly appears at the Antarctic pole, and ferocious sea monsters sweep across the coasts of the world. Human civilization is in danger, and only the majestic mechas can fight! However, the turning point on the battlefield does not come from technology, but from the "element crystals" shining in the Kraken's corpse. When human warriors absorb the power of crystallization and take the power of fire, ice, and thunder into their hands, the war enters a new era of magic. We held the continental shelf and established inland sea fortresses. But in the deep sea area where communication is silent, the screams of the sea monsters become more and more violent, as if calling for their... King?