The Battle Hall lets you start or join rallies. The rally leader's Battle Hall level determines the maximum number of Soldiers in the Rally. Every troop involved in the Rally uses the stats of the rally leader, and not the stats of the player who owns the troops, so it's important to let your strongest member lead the rally.
War Tomes can be obtained in chests from monsters, as a possible guild fest reward, or gift packs bought. They can also be purchased in the gem shop. It is recommended that you only buy the 1,000 stacks until your Battle Hall is level 24, at which point you can buy the lower ones for the remainder.
Total number of required War Tomes: 20,000.
War Tome Costs: 1 for 15 gems, 10 for 120 gems, 100 for 1,100 gems and 1,000 for 10,000 gems.
Tip: you need this building maxed for academy level 25 same with the altar and prison so spend gems on these buildings as much as possible so you can unlock t4 faster
Upgrade Results 
Edit
| Level | Might Bonus | Max Coalition
Army Size | Required |
Original Build Time |
|---|---|---|---|---|
| 1 | 30 | 20,000 | Embassy: Lv.1 | 00:02:00 |
| 2 | 60 | 40,000 | Embassy: Lv.2 | 00:04:00 |
| 3 | 90 | 80,000 | Embassy: Lv.3 | 00:08:00 |
| 4 | 126 | 120,000 | Embassy : Lv.4 | 00:16:00 |
| 5 | 176 | 160,000 | Embassy : Lv.5 | 00:32:00 |
| 6 | 247 | 180,000 | Embassy : Lv.6 | 01:04:00 |
| 7 | 346 | 200,000 | Embassy : Lv.7 | 02:08:00 |
| 8 | 484 | 220,000 | Embassy : Lv.8 | 04:16:00 |
| 9 | 677 | 240,000 | Embassy : Lv.9 | 07:40:48 |
| 10 | 949 | 260,000 | Embassy : Lv.10 | 12:17:17 |
| 11 | 1,328 | 280,000 | Embassy : Lv.11 | 15:58:28 |
| 12 | 1,860 | 300,000 | Embassy : Lv.12 | 18:22:15 |
| 13 | 2,603 | 350,000 | Embassy : Lv.13 | 21:07:35 |
| 14 | 3,645 | 400,000 | Embassy : Lv.14 | 1d 00:17:43 |
| 15 | 5,102 | 450,000 | Embassy : Lv.15 | 1d 03:56:22 |
| 16 | 7,144 | 500,000 | Embassy : Lv.16 | 1d 08:07:49 |
| 17 | 10,000 | 550,000 | Embassy : Lv.17 | 1d 12:57:00 |
| 18 | 14,001 | 600,000 | Embassy : Lv.18 | 1d 18:29:32 |
| 19 | 19,602 | 700,000 | Embassy : Lv.19 | 2d 00:51:58 |
| 20 | 27,442 | 800,000 | Embassy : Lv.20 | 2d 08:11:46 |
| 21 | 38,419 | 900,000 | Embassy : Lv.21 | 3d 01:03:18 |
| 22 | 53,787 | 1,000,000 | Embassy : Lv.22 | 4d 20:53:16 |
| 23 | 75,302 | 1,250,000 | Embassy : Lv.23 | 8d 18:23:52 |
| 24 | 105,422 | 1,500,000 | Embassy : Lv.24 | 15d 18:42:58 |
| 25 | 179,217 | 2,000,000 | Embassy : Lv.25
Gold Hammer: 1 | 55d 05:30:20 |
At level 25 the Battle Hall increases Coalition Army ATK by 10%.
Resource Requirements Edit
The "invested gems" column assumes you only pay 10 gems per tome. To calculate how many gems you would need to spend to level the Battle Hall from a certain level to another simply substract each individual gem investment.
| Level | Food | Stone | Timber | Ore | War Tomes | Total invested gems |
|---|---|---|---|---|---|---|
| 1 | 140 | 140 | 140 | 140 | 1 | 10 |
| 2 | 210 | 210 | 210 | 210 | 2 | 30 |
| 3 | 315 | 315 | 315 | 315 | 5 | 80 |
| 4 | 472 | 472 | 472 | 472 | 12 | 200 |
| 5 | 708 | 708 | 708 | 708 | 20 | 400 |
| 6 | 1,063 | 1,063 | 1,063 | 1,063 | 30 | 700 |
| 7 | 1,594 | 1,594 | 1,594 | 1,594 | 45 | 1,150 |
| 8 | 2,392 | 2,392 | 2,392 | 2,392 | 60 | 1,750 |
| 9 | 3,588 | 3,588 | 3,588 | 3,588 | 85 | 2,600 |
| 10 | 5,382 | 5,382 | 5,382 | 5,382 | 100 | 3,600 |
| 11 | 8,073 | 8,073 | 8,073 | 8,073 | 120 | 4,800 |
| 12 | 12,109 | 12,109 | 12,109 | 12,109 | 150 | 6,300 |
| 13 | 18,164 | 18,164 | 18,164 | 18,164 | 180 | 8,100 |
| 14 | 27,246 | 27,246 | 27,246 | 27,246 | 250 | 10,600 |
| 15 | 40,870 | 40,870 | 40,870 | 40,870 | 340 | 14,000 |
| 16 | 61,305 | 61,305 | 61,305 | 61,305 | 500 | 19,000 |
| 17 | 91,957 | 91,957 | 91,957 | 91,957 | 700 | 26,000 |
| 18 | 137,936 | 137,936 | 137,936 | 137,936 | 900 | 35,000 |
| 19 | 206,904 | 206,904 | 206,904 | 206,904 | 1200 | 47,000 |
| 20 | 310,357 | 310,357 | 310,357 | 310,357 | 1500 | 62,000 |
| 21 | 465,535 | 465,535 | 465,535 | 465,535 | 1800 | 80,000 |
| 22 | 698,303 | 698,303 | 698,303 | 698,303 | 2100 | 101,000 |
| 23 | 1,047,455 | 1,047,455 | 1,047,455 | 1,047,455 | 2400 | 125,000 |
| 24 | 1,571,183 | 1,571,183 | 1,571,183 | 1,571,183 | 3000 | 155,000 |
| 25 | 3,142,367 | 3,142,367 | 3,142,367 | 3,142,367 | 4500 | 200,000 |
| Buildings |
|---|
| Core Buildings
Castle - Castle Wall - Barracks - Infirmary- Workshop Farm - Lumber Mill - Manor - Mines - Quarry Academy - Embassy - Trading Post - Vault - Watchtower Altar - Battle Hall - Prison - Treasure Trove Gym - Monsterhold - Mystic Spire - Spring |
