When you surpass chaos place (difficulty) on the map, you will be able to rebirth. When you rebirth, you are given five "free" points to distribute, but for every map you progress you gain one extra point on top of the initial five. These points can be used to enhance one of three aspects of your new game, improving it by 10%: your EXP rate, your money gains, and finally your drop rate. Each bonus provides different perks, and it is up to the player to decide how they should be distributing their points.
When adding points, the initial cost for each different trait is one point for one level, however, every five levels this cost increases by one point. For example, to increase from five to six will cost two points. To increase from 15 to 16 will cost four points.