Confirm to instantly receive your rewards in your in-game mailbox. Essential Types of Codes
Since codes aren't an option, veteran players use these "tricks" to maximize resources: Reward Code? - Neo Monsters - ZigZaGame Forum
If you are a returning player after years away: Instead, enjoy the game’s deep mechanics – team synergy, ability combos, and the 4v4 battle system – which are more rewarding than any free gem code.