A conversation between Shadow and Sensei discloses that when Shadow opened the Gates of Shadows, it not only caused him to lose his body and obtain his shadowy appearance but also acquired a special power. The power, Sensei states, is that Shadow has the ability to cause an Eclipse on the sun if he desires to. This Eclipse will make his opponents stronger, but will also allow Shadow to win precious rewards. These rewards are the Shadow Orbs. Sensei also says that Shadow can call off the Eclipse any time he wishes to. Sensei then proceeds to show Shadow how to utilize this power.
The Eclipse is a state in Shadow Fight 2. The game map denotes the Sun in the top right corner. It stays fixed there in any part of the map. This Sun is the switch to turn Eclipse on and off. Clicking it once will turn the Sun's color from yellow to black and clicking it again will make it turn back to normal. This can be done as and when willed.
The speciality of Eclipse is that when all Tournaments, Challenges and Storyline Fights have been completed, Shadow can choose to replay any of these to earn green Shadow Orbs, Eclipse Achievements and Demon Weapons which are obtained by defeating the respective demon. If played in eclipse mode before the first completion, Tournaments and Challenges along with Bodyguards offer a big amount of green and red orbs, while beating a boss in eclipse mode will grant the player purple orbs in addition to that.
In Eclipse, the difficulties of all modes of play increase (with the exception of Ascension, raids and Challenger fights). The opponents are more resistant to attack, stronger in their offense and defense. Playing in the eclipse mode will reward shadow orbs and coins .
Shadow Orbs are of three types: Green, Red, and Purple. Green orbs are obtained in almost every fight, though in very small amounts. Red orbs, however, are restricted to Storyline, Tournament and Challenge fights. If played in eclipse mode, the previously mentioned fights will reward the player with greater amounts of the two mentioned orb types.
Purple Shadow Orbs are the rarest and hardest to obtain. They can be acquired by winning a demon fight in eclipse mode for the first time. However, an easier and more reliable way of getting purple orbs is playing Ascension.