Blue genes are acquirable by logging in daily for 24 days (happens only once a month, can be seen in the Check-in Event menu). Blue glues can be exchanged for 670 genes of the chosen hero. If the hero has already been unlocked and the user decides to exchange for the genes of that hero again, the player will gain 670 genes, which can be used to skill up the hero. Blue gene heroes can only be skilled up with the genes gained from blue unknown genes and perfect genes, it takes in minimum to obtain and max the skill of one hero 4 months .