Originally Posted by
Zoldor
Move him to a more subdued role, let him be a father, he doesn't have to be center stage. Just killing him because is a total waste. He doesn't have to be all to end all for the Orcs either. They could easily have written a new character for the Orcs to have come up and be a real leader. Someone who lived under the new horde and grew up there under the ideals of Thrall. That is just spitballing, which is better than "he's become to powerful quick get the Axe."
Have his power slowly dwindle, bring in new shamans etc. There is all kinds of stuff better than a quick death, granted they require you to actually care about not taking the simplest route. Not all heroes die in battle some grow old and take a back seat to the young. Become mentors and teachers. Not all powerful people retain that power into their older ages especially after using so much of it so often saving the world.