Cledarius, I think youre on the right track, but I think he is refering more to Zigbar.

White, it's all I see, he is in the snow in the land of dragons and the world that never was is white as well
Standing in this land, see explanation of first line
Looking inside myself, there is nothing, He is a nobody like Cledarius said in his explanation
But desire and hatred. He does not like Sora and wishes to have a heart
In to my eyes he stares, When you first confront Zigbar in the hallway in the land of Dragons, you have a slight stairdown.
Blocking the door from view, You are in eachothers way in the first encounter.
My weapon summoned, my element twirling, He summons his weapon, his guns, and can twirl the area around you with his element, space.
His head shall be a prize. As Cledarius said, you need to fight him.