Chrono Wars: Light of Darkness has just introduced a new feature called the Dragon Arm System. Activating your Dragon Arm will allow you to carry the tremendous power of dragons on your right arm, increasing three basic attributes (Attack, Defense, HP), as well as opening up three new battle attributes: Grit, Block, and Block Rate.
To upgrade the Dragon Scales you’ll need Dragon Scales, which can be obtained from the Dragon Treasury Challenge. You can enter it after level 59 and the challenge is open all day. Conquering each floor of the Dragon Treasury will let you upgrade your Dragom Arm and unlock more attributes and BR.
Here is a trailer showing the Dragon Arm in action. You can play Chrono Wars here.