Talk:Dragon Treasures/@comment-58.6.225.133-20130216231711/@comment-1321146-20130929060018

You get Rare cards for completing the sets. While that isn't the Mega Rare you're asking for, you need to realize that these quests are for new players to get cards quick, and later for experienced players to get a few skill feeders (although the selection is limited as far as that goes).

It would break the game balance to offer Mega Rares or even Super Rares merely for completing a quest set. Those cards are earned through bigger efforts.