Collectible Creatures with a Twist. Kuroba is a new way to play rock, paper, scissors! Select your play strategy and battle with your friends or train with your own practice cube! These Night Kuro feed on wishes, and are most often seen during meteor showers. Those caught in their crosshairs can be forgiven if they think the sky is falling, because Incubrights fight by raining space rocks down on their opponents. Be forewarned, if you want to add one of these to your collection, be careful what you wish for. Rain space rocks down on their opponents - like flaming shooting stars. They do not expand - they are difficult to see and are super fast.