Raise your City's Great Dragon by upgrading the Dragon's Keep.
The game starts with a level 1 Dragon Keep already built in your City and each Outpost you build. As you upgrade the Keep, its size, stats and appearance will change as well as the appearance of your Dragon within it.
The time required to upgrade a Dragon Keep with level 0 Levitation is shown when you upgrade the Keep regardless of what level Levitation you have and, therefore, no matter what the actual build time is. The actual build time will be shown in the "Building" Bar on the right hand side.
Requirements for Upgrade and Power Boost
|5||6,400||24,000||40,000||11,200||19,200||1h 36m 0s||N/A||400|
|6||12,800||48,000||80,000||22,400||38,400||3h 12m 0s||N/A||800|
|7||25,600||96,000||160,000||44,800||76,800||6h 24m 0s||N/A||1,600|
|8||51,200||192,000||320,000||89,600||154,600||12h 48m 0s||N/A||3,200|
|9||102,400||384,000||640,000||179,200||307,200||1d 1h 36m 0s||N/A||6,400|
|10||204,800||768,000||1,280,000||358,400||614,400||2d 3h 12m 0s||Completion Grant||12,800|
|11||205,000||None||1,280.000||358,000||614,000||4d 6h 24m 0s||25,600|
|12||204,800||none||1,280,000||358,400||614,000||6d 9h 36m 0s||51,200|
For more information, please visit the Great Dragon page. There are also many more dragon keeps in your outposts for different dragons such as the Water, Stone, Fire, Wind, Wraith, Frost, Mephitic Serpent, Amber Crest, Helio, Chrono, Kaiser, Steelshard, and Luna dragons.