Moon is a little bit harder to figure out and play with, but with Moon, you can stage dramatic comebacks and turn the tide of battle (especially towards the later stages) with a single attack.

When other players attack Moon, the damage taken to a color of marble transfer into increased attack power for that marble color. And you can use Transmute to give that extra attack power to another color. If you are down, you can strategically build up and aim for your enemy's weak spot in the chain and unleash a potentially massive attack. This can sever the chain just in time for you to claim it and change the tide of battle. Besides, doing massive damage just feels good.