Presumably being held in conjunction with the WCS Qualifiers to encourage Dueling.
The Idea is to keep Dueling and acquire prizes such as Gold, Gems, Jewels and the SPell Card “Eternal Rest”.
The prize card of the event is “Eternal Rest”, a Spell Card that destroys all monsters with Equip Cards. Basically an anti “Noble Knight” card among other uses.
Everything other than Standard Duelists grants you 40 Points. 5 Times a Day grants you extra bonuses.
The two key prizes are “Heavy Slump” and “Eternal Rest”, while the rest of the major prizes are Gems and Gold.