[quote=@Ammokkx]
<Snipped quote by LunarStandard>

Shun used RUM's. They most certainly did use spell cards.

EDIT: oh wow. It literally only says it can't be destroyed. The fuck are they going to do if it gets bounced back into the hand or shuffled into the deck?
[/quote]

Well, Speed Worlds were just straight-up was not affected by other card effects in the World Championship series. 

Like, you play Giant Trunade and it bounces every card except Speed World. They also could not be targeted.

But yeah, in that case the Neo text is just redundant.