The dark ignika is actually another ignika from an alternate reality. This one was via from it's reality by the great beings of the elintari reality. It then had almost all of it's powers stripped via the great beings so that they could revive matoro without requiring another sacrifice. their plan worked but the ignika lost all sense of moral due to the large and sudden loss of powers. The great beings realized their mistake locked the dark ignika in a special prison in their fortress. Unknown to them the ignika still had access to some of his powers. The only powers he retained was the ability to drain energy from any living thing through direct contact, the ability to quickly heal it's self and it's final ability was to create a body for it's self although it could only do it once. Eventually the dark ignika was able to use a little bit of telepathy and lure the guard who was watching over the cell, to touch it. when the guard touched it the ignika took all his energy in an instant which caused the guard to die. he then used the body forming ability and used the molecules from the guards body to create the body you see now.
The dark ignika was able to escape the fortress but not before stealing a large triple bladed sword from the great beings armory. since then the dark ignika has traveled spherus-magna searching for a decent purpose at what it should do now.
The dark ignika has lost what good he had left in his spirit. he now acts in a very dark and cruel manner. he finds himself better than anyone else. when fighting he will not hesitate to kill is opponent.