Talk:Air Shrine/@comment-166.147.99.130-20120121023600/@comment-108.48.102.31-20120207021815

You don't have to keep them, but after you get your 50 level 10s, if you sold most of them you'll be leveling the same number of dragons again to get them to level 15. At about 10,000 food just to get a dragon to level 10 that's a lot of wasted cash and food. Now they have the hibernation cave (after I've sold dozens of level 10 dragons), but it only fits 25 dragons at first (you need 50 gems to upgrade and let more sleeping dragons lie).