Board Thread:Quests and Special Events/@comment-14062297-20130813201244/@comment-10090661-20130816063639

Time extension not likely. The missing horns are probably due to how they are accepting it. Done correctly, you should be getting 6 horns instead of three.

Personally, I reduce the number of gems I have to spend as much as possible, then spend gems on the rest of the requirements. It isn't worth my time to wait so long and get frustrated over a game. Of course, if you treat the difficulty as a challenge, then its worth it to get bragging rights. "I never spent a single gem to complete the Viking Island!" xD

By my estimate you should be able to collect about 100 gems a month, through the Stadium Tourneys and through PVP leveling. Gems through game leveling is a bonus.