The green cube on the right is called a Dimension Cube, which only opens in a few special conditions, and when opened, will transform into a Dimension Portal that connects the Void and other dimensions such as the overworld that we live in, it also connects to other unknown dimensions, leading to UDCs (Unknown Dimension Creature) to come out. As for the Boss, we don't have a name for it yet, all we know is that it got into the Void because of it's massive destruction in another dimension 300 million years ago. Oh wait it's name is Kyur
Art and idea by @-SupaNovaBomb- !
