An artefact is hosted in your town's hall or castle. It can be moved instantly to any other town you own. It only offers its bonuses to the town that has it.
Purse of Wealth
Price: 600 BP
Purse of Wealth increases your your town's gold production by 25% per hour.
Herbs of Abundance
Price: 1000 BP
The Herbs of Abundance increase your town's corn, lumber, stone and iron production by 10% per hour.
Magic Seeds
Price: 2000 BP
The Magic Seeds increase your town's corn, lumber, stone and iron production by 25% per hour.
Light of Kimera
Price: 6000 BP
This artefact increases your town's overall production (corn, lumber, stone, iron, gold) by 50% per hour.
Petrified Leaves
Price: 2900 BP
The Petrified Leaves increase your town's crop production by 100% per hour.
The following artefacts can also be obtained by raiding Treasure Caves. Still, the drop rate is rather small. Also, the artefacts can only be found after defeating an important number of bandits.
Small Herbs of Abundance
Price: 250 BP
The Small Herbs of Abundance increase your town's corn, lumber, stone and iron production by 2% per hour.
Small Petrified Leaves
Price: 390 BP
The Small Petrified Leaves increase your town's crop production by 5% per hour.
Small Purse of Wealth
Price: 180 BP
Small Purse of Wealth increases your your town's gold production by 5% per hour.