BT - Neither Mozz nor I are/will be at Worlds, so, no, you can't get it there. There are too few people posting that they have the Amada cards, so it doesn't look like it.
Poliwag92 - Changes submitted the same day as your initial entry are okay. We really can't handle everyone changing their decks over the course of the contest. There was plenty of time for everyone to give very careful thought to their entry before submitting.
KingGengar - Originally the rules said you had to be a member for a month before entering, but that was shortened to two weeks. Two days is a but too short, however. (I'll ask mozz, though...)