Uchikudake Nanatsu no umi no Mammoth Pillar

Seiya and Shun recover and defeat the Mariners who have arrived. Meanwhile, Poseidon takes Saori to a place where she will give humanity a chance to live, by sacrificing her life. He explains that the underwater Sanctuary has Mammoth Pillars that hold up the seven seas: the North Pacific, South Pacific, North Atlantic, South Atlantic, Indian, Arctic, and Antarctic Oce...