Seeds of Renewal Bug
During my sixth match, I've cast Season of Renewal to bring back two permanents from my graveyard. I had both an enchantment and an enchantment creature. After I've chose my first pick, cards randomly changed places and resulted in my not getting my removal, Twisted Embrace.
I've paid 10k for the event and might've gotten seven wins if not for the cards changing places and resulting in me not being able to remove opponent's huge flyer.