You currently can not unlock this feature, no matter what townhall you are. The developers have mentioned that they are exploring ways to add a 3rd guardian dragon into the game.
Do you know if and/or when this may take place? We have a third spot for another dragon so why explore the idea instead of making it happen? Just curious.
I highly doubt they will ever let you have a third dragon on defense.... it would give an even greater advantage to defenders. You already have accounts in this game that are physically unralliable (even with the attacker having max everything). However, I would not be surprised if they tie in a boost to pvp defense through idols.
Yeah I figured as much and get that that’s a good reason. I was just curious and kind of wishful that they might. Ah well than. It’s better if they don’t.