Space-time door.jpg door.JPG 時空之門 Pronunciation: Shi Kong Zhi Men The Door of Time and Space is the crossing border that divides dimensions yet keep them linked with each other. It allows power-users with power levels of over 8000 to cross over to other dimensions. Only a person known as the "Key Man" will have the power to close it. Once it's closed, no one will be able to cross over to other dimensions. The only notable way to open the portal again is for the Ultimate Iron Man to be born and let him use his unlimited amount of power to open it.