Burning Forges, is an upgrade for the fortress of the Isengard faction. The upgrade reduces the cost of Isengard unit upgrades by 10% - 35%, depending on how many fortresses you've built and upgraded with this upgrade.
- 1 Fortress with Burning forges upgrade = 10% cheaper
- 2 Fortresses with Burning forges upgrade = 20% cheaper
- 3 Fortresses with Burning forges upgrade = 25% cheaper
- 4 Fortresses with Burning forges upgrade = 30% cheaper
- 5 Fortresses with Burning forges upgrade = 35% cheaper
Cost: 750