Spa

Description
The Spa was the building where you could send your heroes to rest after a battle to restore their Vigor, a mechanic that limited how much a hero could be used in the Tea House, and while depleted would reduce the amount of rewards for winning or losing a game. It also increased Vigor regeneration of all heroes by 3% (+3% per upgrade).

There were 4 options as to how to regain your heroes' vigor:
 * Option 1: Restored vigor for 1 outpost in 5 seconds for a low ammount of silver.
 * Option 2: Restored vigor for 1 battle in 10 seconds for a medium ammount of silver.
 * Option 3: Restored full vigor in 10 seconds for a higher ammount of silver.
 * Option 4: Restored full vigor instantly for a low ammount of gold.