Dungeon Castle Buildings — Olden Era Build Planner

Plan your Dungeon castle upgrades in Olden Era. Track all 35 Dungeon buildings, set your build order, and optimize resource production across the full campaign timeline.

• Spy NetworkCompletely removes the fog of war. This city’s dwellings produce +100% units.
• TavernAllows the hiring of new heroes.
• MarketplaceAllows resources to be traded.
• Artifact MerchantAllows artifacts to be traded.
• Byzantine PlaceGrants the kingdom 500 Gold, Law points, and Astrology points daily. +1 hero cap.
• Byzantine Place IIGrants the kingdom 750 Gold, Law points, and Astrology points daily. Allows the owner to pick one level-1 economy upgrade.
• Byzantine Place IIIGrants the kingdom 1000 Gold, Law points, and Astrology points daily. Allows the owner to pick one level-2 economy upgrade.
• Resource DepotProduces 1 Gem daily.
• Alchemic DepotProduces 5 Alchemical Dust daily.
• GymnasiumLevels up any visiting hero once.
• LyceumAllows enchanting of magic scrolls so that they grant spells of maximum level.
• BankProduces 1000 Gold daily.
• TreasuryProduces 2000 Gold daily.
• FortificationsProvides walls during sieges. Allows the builder to pick one level-1 defensive upgrade.
• Fortifications IIAdds two towers to the battlements that shoot at attackers during sieges. Allows the builder to pick one level-2 defensive upgrade. City dwellings produce +50% units.
• Fortifications IIIAdds one more grand tower to the battlements that shoots at attackers during sieges and spikes by the walls. Allows the builder to pick one level-3 defensive upgrade. City dwellings produce +100% units.
• WarrenAllows the recruitment of Troglodytes.
• Warren IIAllows the recruitment of Infernal Troglodytes and Toxic Troglodytes.
• Amphitheater IIAllows the recruitment of Jasper Dancers and Aureate Dancers.
• AmphitheaterAllows the recruitment of Onyx Dancers.
• Stilled VoicesAllows the recruitment of Medusae.
• Stilled Voices IIAllows the recruitment of Medusa Sculptors and Medusa Queens.
• Safe HouseBuilding details
• Safe House IIBuilding details
• Labyrinth IIAllows the recruitment of Minotaur Lords and Minotaur Vanguards.
• Chthonic HomeAllows the recruitment of Hydras.
• Chthonic Home IIAllows the recruitment of Chthonic Hydras and Infernal Hydras.
• LabyrinthAllows the recruitment of Minotaurs.
• Cave PlaceAllows the recruitment of Cave Dragons.
• Cave Place IIAllows the recruitment of Black Dragons and Ashen Dragons.
• Mage GuildUnlocks 7 random tier‑1 spells in the Magic Observatory and the ability to spend dust to upgrade tier-1 spells or unlock additional ones. When heroes visit the city, all unlocked tier-1 spells are added to their Spellbook.
• Mage Guild IIUnlocks 6 random tier‑2 spells in the Magic Observatory and the ability to spend dust to upgrade tier-2 spells or unlock additional ones. When heroes visit the city, all unlocked tier-1–2 spells are added to their Spellbook.
• Mage Guild IIIUnlocks 5 random tier‑3 spells in the Magic Observatory and the ability to spend dust to upgrade tier-3 spells or unlock additional ones. When heroes visit the city, all unlocked tier-1–3 spells are added to their Spellbook.
• Mage Guild IVUnlocks 4 random tier‑4 spells in the Magic Observatory and the ability to spend dust to upgrade tier-4 spells or unlock additional ones. When heroes visit the city, all unlocked tier-1–4 spells are added to their Spellbook.
• Mage Guild VUnlocks 3 random tier‑5 spells in the Magic Observatory and the ability to spend dust to upgrade tier-5 spells or unlock additional ones. When heroes visit the city, all unlocked tier-1–5 spells are added to their Spellbook.