This chamber is in the process of creating a creature.
The Creature Chamber is a structure from which the player may create combined creatures. As such, it is one of the most important buildings in Impossible Creatures.
The Creature Chamber is normally restricted to the creation of land-based creatures, but if the player constructs a Water Chamber, amphibious units can also be created by it. A player may build multiple Chambers to speed up production, as the building can only create one creature at a time.
The Creature Chamber can only create a creature if its appropriate research level has been unlocked. For example, research level 3 must be completed before level 3 creatures can be created. Creatures of higher research levels typically require more time to create.