Trial by Fire
The Trial by Fire must be constructed to siege a Town.
"Construct a Stake to begin conducting a Trial by Fire against an enemy Town and/or Claim. The Trial begins 24 hours (instant if the village is less than a week old) after the Stake has been constructed. Once constructed, the Stake is impossible to destroy until 4 hours before the Trial begins, (i.e., 20 hours after the Stake was first constructed). If the Stake is destroyed, the Trial ends.
While the Trial is underway, crimes of Waste -- destruction of property -- can be committed against everything under the area of influence of the Stake.
The Stake is a Town specific building and drains your own Town of 20 authority per hour.
NOTE: The Stake projects its entire area of influence forward and to the sides, so make sure that it faces the intended target area."