Purchasing additional treasure chests increases the rate of hero appearance. Without chests, a hero will spawn every 220 seconds (3 minutes and 40 seconds), and each chests decreases that time by ten seconds, so having 9 chests (apparently the maximum according to the data so far) will turn that time into 130 seconds (2 minutes, 10 seconds)
Hero Drops[]
When killed, heroes drop either gold, health potions or monster eggs[]
Each Hero drops an amount of gold equal to your current INT multiplied by the number of hero (for example, Folk 1 drops 1*(current INT), while Birdman drops 7*`(current INT])
Health potions don't drop if you have any monster with the Sand Glass item equipped.
Each hero type drops a certain type of monster egg.
Hero Types[]
As the total intelligence score increases more types of heroes appear.[]