The xp reward was 50% of the next level, capping at 1,000,000,000 xp, during the initial live event. You also got the Rare Pack T'thuun that time. After that the xp reward capped at 500,000,000 xp, even if it was the first time for that character. --Widgeon 10:08, 24 February 2009 (CST)