Missed the Call: Despite having looked forward to it for months, Yuma failed to actually sign up for the World Duel Carnival (a process that would have taken under a minute to complete), assuming that he'd just naturally receive an invite
Exodia the Forbidden One Speaking of cards that were absolutely insane but hard to get, Exodia the Forbidden One was something of a playground myth
Whenever an FTK deck is a core part of the meta, players get frustrated and want Konami to ban the specific cards that are causing the issue
A deck focused on maintaining high-ATK monsters in Attack Position, such as a Beatdown or Aggro deck, would benefit from using Dimension Sphinx to punish opponents for attacking your monsters with higher ATK
This allows Juri, Master Of The Revue to grow to substantial stats, as sacrificing is something Rakdos can do quite easily