To find out how best to host allied warriors in your Town, invite a foreign craftsman to renovate the Inn. This Study will increase the number of reinforcement troops that your Town can host.
| Level | Drafts | Gold | Time | Requirements | Reinforcement Troops | Power |
| 1 | 250 | 41.5K | 1w 12h 00m 00s | Scholars' Hall 4 | 1 | 13M |
| 2 | 315 | 50.5K | 1w 3d 00h 00m 00s | - | 3 | 13M |
| 3 | 400 | 62K | 1w 6d 12h 00m 00s | - | 5 | 13.5M |
| 4 | 520 | 80.5K | 2w 5d 00h 00m 00s | - | 9 | 13.5M |
| 5 | 690 | 115K | 4w 12h 00m 00s | - | 14 | 13.5M |
| 6 | 930 | 165K | 6w 3d 00h 00m 00s | - | 20 | 13.5M |
| 7 | 1 300 | 260K | 10w 4d 12h 00m 00s | - | 30 | 14M |
| 8 | 1 850 | 420K | 18w 4d 00h 00m 00s | - | 40 | 14M |
| 9 | 2 600 | 725K | 34w 00h 00m 00s | - | 50 | 14M |
| 10 | 3 800 | 1.35M | 65w 3d 12h 00m 00s> 1 Year(s) | - | 60 | 14.5M |
| 12.66K | 3.27M | 146w 2d 12h 00m 00s> 2 Year(s) | 60 | 136.5M |
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