This is the scene in the Belgariad Saga where Durnik dies:
[Zedar talking to Polgara]: Save yourself that agony. In the end, you’ll go to him anyway. You’ll go willingly - even eagerly.”
There was a sudden scraping in the room beyond the iron door, and a quick rush of feet. “Durnik!” Aunt Pol cries sharply. “No!”
“What’s happening?” Garion demanded of Belgarath.
“That’s what it means!” Belgarath gasped. “Get that door open!”
“Get back you fool!” Zedar was shouting.
There was a sudden crash, the sound of bodies locked in struggle smashing into furniture.
“I warn you,” Zedar cried again. “Get back!”
There was a sharp sound of a blow, a fist striking solid bone. “Zedar!” Belgarath roared, yanking at the iron door.
Then within the room there was a thunderous detonation.
David Eddings: Belgariad Saga 5, Enchanters’ End Game, Mallorea
Okay, so Durnik is, for some reason, attacking Zedar, the two end up fighting and there’s an explosion.
But why does Durnik attack such an out-matching enemy at all, and why now? Also, Polgara seems to be doing nothing about it.
Furthermore, his corpse is later described as
crumbled on the floor, and whose face had that deathly pale to it that could only mean one thing.
It doesn’t sound like he blew up, so what exactly happened in there?