Colossus Order

Colossus Order (COLOSSUS ORDER コロッサス・オーダー) is a manga series by Kazuki Harumoto. It is serialized in V-Jump.

Plot
The land is split between four different countries; A land of kindness, Piadin; a society that lives in harmony with nature, Fastogal; A land of the free-spirited, Caoren; a land of evil, Valden. Each land lives in balance with one an other, but how will things will change once Valden gains the powers of the Colossi, the gigantic warriors of old?