Fire Proof
Fire Proof is a special upgrade in Loot Grinder, the free medieval idle clicker.
What it does
Reduces chance of peons burning in forest fires. (Reduces chance of peons burning in forest fires.)
Cost
It costs 450M loot and is a one-time purchase.
Why it’s useful
This protection greatly reduces the peons you lose to the matching disaster, keeping your population (and its loot) intact.