You can now do the Viking Island challenge on your PC/Mac and get Odin, Thor and Loki dragon. You have to complete 4 quests in order to collect all of them. The event ends December 11th 2013.
To unlock the Viking habitat, you will need to break all the glasses. Breaking the glasses wlil require a few tasks. You have to:
- Collect 1,101,000 gold to break 4 glasses
- Send gifts to your friends and collect 9 horns to break 3 glasses
- Collect the hammer every 12 hours 4 times to break 3 glasses
Once you have done that, you can get the Viking Habitat, you can press on to get the 3 magnificent dragons.