You need 666 dragon scales to fight the final stronghold of Nidhoeggr which you get from the gathering ships and stations.
You need 16 snake mountain tiles which you get from snake mountain strongholds who protect the stronghold of Nidhoeggr to build level 5 hiding buildings on it.
Does this mean that my island, before start getting these tiles, should be 2.000 big plus 666 dragon scales, plus 16 snake mountains, which will give me a total size of 2.692 tiles, or do I need to grow my island no longer than 1.318 to add these extra tiles and be a total size of 2.000?
And can these 666 tiles be in only one area of the island, like a production area, that is compact?
NEVERMIND HERE, ANSWERED IN THE PREVIOUS POST. IT WAS POSTED WHILE I WAS ASKING.