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Well after taking a 4 set hiatus from this game, I've decided to come back and play this game. So I have a few questions, and thanks for the answers in advance.

1. What sets, promos and reprints are legal? (A link to an answer would be great.)

2. What decks are "meta"?

3. What decks/cards are people raging/whinging about?

4. Is JDragon still #1?