Chests (4):

• Ribbon (x4)

The World of Darkness has 5 portals in total, 4 at the edges and 1 in the middle. You objective is to kill all bosses in the portals at the edges first.

Congratulations on defeating Cloud of Darkness. It's not over yet if you plan to confront Iron Giant, so watch the ending credit and save your game. After it is finished, load your game from the slot that you just saved in, you will be loaded right in front of the Crystal Tower.