We have updated CastleStorm –Free to Siege with a new feature called RAID MODE! Every day will offer an action-packed new raid to play, each one consisting of 3-battle mini-campaigns that are available for only 24 hours! Choose either Knights or Vikings and plunge into a new battle every day!
Completing raids will help you earn pearls, which can be cashed in for gems usable on upgrades. The more pearls you convert at one time, the better conversion rate you get, so be sure to save up as much as you can before you cash them in!