After feeding a dragon to level up it has to be trained in the Academy to continue to gain levels.
In the beginning only one dragon can be trained at the Academy at a time.
A purchase option to train up to two, three or four dragons at the same time is available by using the premium currency of the game, 
.
Building Progression
| Level | Train dragons up to level... |
Upgrade to Next Level | ||
|---|---|---|---|---|
| Vikings Required |  /
|
| ||
| 1 | 6 | 5 | 600
|
10m |
| 2 | 12 | 15 | 7,600
|
3h |
| 3 | 18 | 35 | 48,000
|
6h20m |
| 4 | 24 | 55 | 180,000
|
12h30m |
| 5 | 30 | 110 | 570,000
|
21h |
| 6 | 36 | 176 | 1,800,000
|
1d |
| 7 | 42 | 425 | 2,750,000
|
1d04h |
| 8 | 54 | 840 | 27,000,000
|
1d06h |
| 9 | 62 | 1,060 | 38,000,000
|
2d |
| 10 | 68 | 1,500 | 79,000,000
|
2d12h |
| 11 | 75 | 1,640 | 248,000,000
|
3d12h |
| 12 | 85 | 2,550 | 480,000,000
|
4d |
| 13 | 100 | 3,210 | 80 
|
4d06h |
| 14 | 112 | 6,350 | 3,500
|
2d01h |
| 15 | 124 | None | None | None |
Premium Upgrades
A second Academy training slot can be opened by purchasing a premium upgrade for 240 .
A third Academy training slot can be opened by purchasing a premium upgrade for 1,490 .
A fourth Academy training slot can be opened by purchasing a premium upgrade for 2,490 .
Premium purchases are instant and permanent.
Building Design
| Academy Lv. 1 | Academy Lv. 2 | |
| Academy Lv. 3 | Academy Lv. 4 | |
| Academy Lv. 5 | Academy Lv. 6 | |
| Academy Lv. 7 | Academy Lv. 8 | |
| Academy Lv. 9 | Academy Lv. 10 | |
| Academy Lv. 11 | Academy Lv. 12 | |
| Academy Lv. 13 | Academy Lv. 14 | |
| Academy Lv. 15 |
| Categories | ||||||
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| Dragon Classes | ||||||
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| Dragon Rarity | ||||||