Swimming Lessons
Swimming Lessons is a special upgrade in Loot Grinder, the free medieval idle clicker.
What it does
Reduce chance of drowning in tsunamis. (Reduce chance of drowning in tsunamis.)
Cost
It costs 225M 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.