Creation: - You can get a stone fence by upgrading a wooden fence.
Trophy: - stone 40
Features:
Ricochet - the attacker gets back 80% of the damage he deals.
Absorption - taken damage is reduced by 95%.
The properties "ricochet" and "absorption" work only if there is a hub nearby within a radius of 75,
and if HP is greater than 10.
The fence can be endlessly updated, each update increases the maximum HP by 500.
The cost of each next level increases by 40 stone.
After update the HP itself does not increase, the fence needs to be repaired, send workers to repair it.