The Sphere: The Phantom of the West Rim

It all began when Rey found a black crystal ball inside the old relic. Taken out of the blue by the mysterious power of the crystal, he finds himself in the world called Terra, a world where the civilization shaped by magical orb called Sphere.
Two decades have passed after the fall of the Dark Lord and Spheria at the time of peace since then. But now the unknown menace spreads in the Kingdom of Ishtar, on the west a mysterious army called Phantoms swept one village to another, took their peoples and leaved the place into desolation.
His unexpected meeting with Scarlett, a royal guardian, has brought him into a mission to investigate this mysterious incident. Along with Aska of the Volk Tribe, a tribe who can transform into wild beast and Eorin, a girl skilled in crafting magic they went into a dangerous journey; hunts by assassins and dragon rider, fought against Gargantua, an abominable giants from nameless realm and battles against the Phantoms.
On the journey they found that the old enemy began to rise and the old horror will spread upon the world.