Learning from Experience reward update is unknown. The last known exp reward for this quest was 250,000. The dialog on this page did list the exp as 500,000, but there is no source for that, and it may have been a copy/paste error.
See https://asheron.fandom.com/wiki/Empyrean_Propylaeum?oldid=221615 and https://asheron.fandom.com/wiki/Learning_From_Experience/Quest_XP_Updates
--An Adventurer (talk) 18:07, August 18, 2020 (UTC)