KembraGM:Jindrich Goldenhair

According to the history books, Jindrich Goldenhair was the first of the Magelords to fall. They're wrong. Instead, he's the only one left.

What the PCs know

1. He's dead.

What I Know

1. He's not dead.
2. He warned the other Magelords of the coming problems. They didn't listen.
3. He advocated against the punishment for Pobrezhia. They didn't listen.
4. He is, to some degree, afraid of what's behind the Frontier. At best, it's a demonic horde. At worst, it's a new breed of demon-tainted devils, waiting patiently for someone to tear down the wall.
5. He knew that the uprising would happen. He didn't know precisely when. For two centuries, he started hiding books and precious devices away in underground catacombs. Most of these have been garrisoned by undead forces.
6. He has studied people, life, death, and undeath. He approached this like an unemotional scientist without significant care for his subjects.
7. He did not know about the plague. He spent a century unraveling it.
8. He was horrified to find out that people who have contracted the plague can pass through the Frontier and allow others to do the same.
9. He wants to resurrect the Magelord Empire because a single nation with the might the empire had would be the best way to defend against what's behind the Frontier.
10. He has agents working for him across the Cursed Isle, including Kembra.
11. He has recently found out that one of his devices, a scrying sphere, came into the possession of Kembra's Foresters. The sphere allows remote scrying of locations but he can override what is seen or can make certain things not seen. He arranged for several other spheres to fall into the Foresters' possession.
12. He is not insane.
13. He is patient.

Questions

1. Why is he still around? Is he undead?
2. Who was it that they killed 500-ish years ago?
3. What is his organization called?