Are those treasure cards from raid decks legal in tournament play?

Indeed they are. In fact they are a strong part of the metagame.

Wooot! Great, I would hate to not able to use mine.

hahah, people loose when they dont have at least one in their deck.

infact all my tourny decks have at least one in it. they are the best cards in the game, thats why they are worth so much.

Unfortunatly you are correct.....sigh