Here you can see how much BTH material you need for which items.
All items that require BTH materials are listed here + also their effects.
Primary build items – Economy
Premium mead storage build item – primary slot – Barrel workshop
Premium honey storage build item – primary slot – Honey gardens
Premium base mead production item – primary slot – Brewery
Premium base honey production build item – primary slot – Apiary
Relic build items – Economy
Premium relic food storage build item – relic slot – Bakery, Relic bakery
Premium relic mead storage build item – relic slot – Barrel workshop
Premium relic honey sotrage build item – relic slot – Honey gardens
Premium relic food production build item – relic slot – Farmhouse, Granary, Relic greenhouse, Relic conservatory
Premium relic mead production build item – relic slot – Brewery
Premium relic honey production build item – relic slot – Apiary
Premium relic refinery production build item – relic slot – Refinery
Premium relic toolsmith production build item – relic slot – Toolsmith
Relic build items – PVP
Premium relic unit limit flanks attack build item – relic slot – Encampment
Premium relic unit limit front attack build item – relic slot – Barracks
Premium relic courtyard attack strength build item – relic slot – The Keep
Premium relic melee unit attack strength build item – relic slot – Relic quarry
Premium relic ranged unit attack strength build item – relic slot – Relic woodcutter
