 
		
Fire Crystal fortifies the shield by changing its texture and increases Infantries’ Health.
| Level | Prerequisites | Research Cost | Time | Bonus | Power | 
|---|---|---|---|---|---|
| 1 | Flame Squad Lv. 3 |  800 000  800 000  160 000  40 000  10 000  40 | 20:00:00 | Infantry Health: 1.50% | 82500 | 
| 2 | War Academy FC2 |  1 100 000  1 100 000  220 000  56 000  14 000  56 | 1d 04:00:00 | Infantry Health: 1.50% | 74250 | 
| 3 |  1 400 000  1 400 000  290 000  74 000  18 000  74 | 1d 13:00:00 | Infantry Health: 3.00% | 90750 | |
| 4 | Flame Squad Lv. 4 |  2 000 000  2 000 000  400 000  100 000  25 000  102 | 2d 03:00:00 | Infantry Health: 3.00% | 99000 | 
| 5 | War Academy FC3 Flame Squad Lv. 5 |  2 700 000  2 700 000  540 000  130 000  34 000  136 | 2d 20:00:00 | Infantry Health: 3.00% | 95700 | 
| 6 |  3 600 000  3 600 000  730 000  180 000  46 000  184 | 3d 20:00:00 | Infantry Health: 3.00% | 98175 | |
| 7 | War Academy FC4 |  4 900 000  4 900 000  990 000  240 000  62 000  248 | 5d 04:00:00 | Infantry Health: 5.00% | 122925 | 
| 8 | War Academy FC5 |  6 600 000  6 600 000  1 300 000  330 000  83 000  334 | 6d 23:00:00 | Infantry Health: 5.00% | 120450 |