Eric

Eric
The only King of Amber to die in battle, Eric spent most of his adult
life figuring out how to get the throne. He was rash and scheming,
Machiavellian to an extreme, and he refused at all times to surrender.
Determination of this intensity has its price, of course, and for Eric
that price was a paranoia that bordered on the psychotic. His hatred of
Corwin was probably the strongest hatred in the Amber royal family;
eventually it led to his rashest act of all, his self-coronation as King
of Amber. That act, more than any other, spelled his defeat. On the
field of death, however, he proved his love for Amber by giving the
powerful Jewel of Judgement, the only thing that could save Amber, to his
most hated enemy.