No. Artefact effects of the same type do not stack.
If you own multiple artefacts with the same effect:
A village-scope artefact overrides an account-scope artefact for that specific village
All other villages continue to use the account-scope artefact
Example: If you own a Faster Troops artefact with village scope and another with account scope:
The village holding the village-scope artefact uses its own bonus
All other villages use the account-scope bonus
Yes. The Stronger Buildings artefact also applies to walls.
You can own any number of artefacts on your account.
However, at any given time:
A maximum of three artefacts can be active
Only one account-scope artefact can be active
If multiple artefacts conflict:
Village-scope artefacts override account-scope artefacts of the same effect
Effects of the same type do not stack
No.
Unique artefacts are considered account-scope artefacts. Even if a unique artefact has a stronger effect, a small (village-scope) artefact still overrides it in that village.
Example:
Unique Eyes (×10, account-scope)
Small Eyes (×5, village-scope)
Scouting operations sent from the village with Small Eyes will use the ×5 effect, not the unique one.
If the Artefact of the Fool changes its scope to account-wide and you already own another account-scope artefact:
The order in which artefacts were obtained matters
The artefact acquired earlier has priority
Yes, depending on scope and acquisition order.
Rules:
The oldest account-scope artefact can be active
The two oldest village-scope artefacts can be active
If no account-scope artefact exists, the three oldest village-scope artefacts can be active
After the activation delay, the correct artefacts will automatically become active.
After activation:
One account-scope artefact
Two village-scope artefacts
will be active at the same time.
No. Once capture conditions are met, artefacts teleport instantly to the appropriate treasury. They do not physically travel with troops or heroes.