Assiéger des Villes et s'emparer de ressources peut coûter une fortune. Pour conserver tes précieux guerriers, tu dois améliorer la puissance de frappe de tes engins de siège. Dans la Citadelle des Valkyries, tu peux augmenter l'attaque des Polybolos.
| Niveau | Nourriture | Fer | Pierre | Argent | Or | Temporels | Conditions | Attaque augmentée - Polybolos | Influence | Expérience du Héros | Expérience de Chaman |
| 1 | 14.5M | 12M | 9.4M | 23.5M | 45.5K | 05h 00m 00s | 1% | 50K | 130K | 130K | |
| 2 | 15M | 12.5M | 9.7M | 24.5M | 62.5K | 11h 00m 00s | Citadelle des Valkyries 23 | 13% | 2.7M | 160K | 160K |
| 3 | 16M | 13.5M | 10.5M | 26.5M | 81K | 1d 03h 00m 00s | Citadelle des Valkyries 24 | 25.5% | 5.5M | 190K | 190K |
| 4 | 20M | 16.5M | 13.5M | 33M | 105K | 3d 03h 00m 00s | 37.5% | 9.05M | 225K | 225K | |
| 5 | 29.5M | 24.5M | 19.5M | 49M | 140K | 1w 2d 00h 00m 00s | Citadelle des Valkyries 26 | 49.5% | 14.5M | 280K | 280K |
| 6 | 49.5M | 41M | 33M | 82M | 190K | 2w 5d 00h 00m 00s | Citadelle des Valkyries 27 | 62% | 22M | 360K | 360K |
| 7 | 85.5M | 71M | 57M | 145M | 270K | 5w 3d 00h 00m 00s | Citadelle des Valkyries 28 | 76% | 34.5M | 490K | 490K |
| 8 | 145M | 120M | 96M | 240M | 390K | 1w 3d 00h 00m 00s | 95% | 53M | 680K | 680K | |
| 9 | 235M | 200M | 160M | 395M | 565K | 16w 5d 00h 00m 00s | Citadelle des Valkyries 30 | 130% | 79.5M | 960K | 960K |
| 10 | 365M | 305M | 245M | 610M | 810K | 26w 5d 00h 00m 00s | 220% | 120M | 1.35M | 1.35M | |
| 975M | 816M | 653.6M | 1.63B | 2.66M | 54w 6d 22h 00m 00s> 1 Année(s) | 220% | 340.8M | 4.83M | 4.83M |
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