3rd level of the "Dragon Boat Invasion" Invasion Event.
Each new Fleur-de-lis you win in this level earns you a reward from this chest! (Items in parentheses are predefined and not random.)
||Card (Magic Buckler)
||Card (Slowdown Tower)
||Card (Holy Tower)
Please check this link for detailed discussion on this level. If you have problems winning other levels, try searching around the forum to find instructions!