Krakia?

I think everybody trusts Isaac's accuracy on this.
http://www.southperry.net/showthread.php?t=218

Some things to highlight from the thread.

"The Alchemist"
A mysterious figure in Masteria's past. He created the Headless Horseman and was the one who set the Krakians on their warpath that completely destroyed the Taru and, eventually, the Keep as well. He shares a lot of traits with Ossyria's villain, the Black Magician. both are Alchemists, and each one wreaked havoc across his own continent (The Black magician poisoned Elin Forest, terrorized Ossyria in general for ages, and the search for the Black Magician was the reason that the Nautilus has been gone for so long.). It may come to light that they are the same person...
New info:
In Magatia, Dr. De Lang's Note suggests that the Black Magician had a disciple, who is likely this Alchemist.

Dr. Krakia
Professor Foxwit's archrival who also seems to have come from the Future. He discovered Krakia, a town of people who cybernetically enhance their bodies, which was lost in the Krakian Jungle many years ago. He is responsible for pumping out the Turkey Commandos during Thanksgiving. Foxwit says that Dr. Krakia has begun to modify his own body, so he could potentially become a boss in the future.
New info:
Dr. Krakia has surfaced once again, helping the Twisted Masters to lead an attack on NLC. Since it looks like Krakia will be the next area released on Masteria, expect to hear more from him soon. Given that he is capable of time travel, he could possibly be "The Alchemist."

Krakians
The sentient plant-like race that lived in the Krakian Jungle, alongside the Taru. They usually kept to themselves, and only traded with the Taru. One day, they fell under the sway of the Alchemist, and suddenly became violent and dangerous. Their first victims were the Taru, and then they proceeded to march on Crimsonwood Keep. The war between the Keep and the Krakians lasted for years, but the Keep finally fell to them right before Masteria disappeared. Krakians who fell in battle during this war would try to bond their spirits to the nearby foliage, and so the Phantom Trees that inhabit Phantom Forest are the aggressive spirits of fallen Krakians. In the present era, the Krakians are being cybernetically modified by the evil Dr. Krakia, a time traveling villain.

The iTCG item descriptions also tend to have tiny clues.
http://www.southperry.net/showthread.php?t=2806