Any unshielded plot can be taken for 1.2× its price. The price then climbs one level. Land is never wiped, it only changes hands.
The vault and campfire slices are swapped into the district's tokenized stock. Every landowner in that district earns it. Whoever holds a plot at season end takes its vault.
A shield makes a plot you own unrobbable for 3 hours. It costs 50,000 $ROB, burned forever. Use it to hold a top-16 plot through a season finale or to keep a loaded vault. It cannot be extended early; when it drops, anyone can rob again.
Also burnable: 20,000 $ROB for 2% off a robbery. $ROB is never minted again.
Each robbery adds 60 seconds, never more than 6 hours ahead. When the clock dies the jackpot pays the last 20 robberies and the 16 most expensive plots; prices reset to 15% and a new season begins. Every payout is pull-based: hit Claim.