Leveling up is a process in the game where one can make their card stats stronger. Each increase in level will distribute three points randomly across a card's stats. Each card can be leveled up to level 8, provided that there are no fails along the way. The two legitimate ways to level up are by using points or using a combination of 32 stars+points. The combination of stars and points guarentees a level up, while using only points can result in a fail.
There is no legitimate way to make sure that all points will go to one stat (eg. +3 to power). Only by hacking can one make sure that a batter will receive all the leveled up points to a certain attribute. As the levels go up the price for points also go up and each card rank(eg. Normal rare platinum etc.) has a higher point price