Talk:The Last Giant/@comment-4012466-20191004195954/@comment-4511886-20191005092354

"The lord of the Giants, who had brought wreck and ruin to the entire kingdom was said to have been felled by an unknown warrior. His beaten and broken remains were then dragged beneath the stronghold, where he was sealed away." -Soul of the Last Giant

I'm not sure how much more clearer the lore could be without outright telling you that you end up killing the Giant Lord later in the game.