There's a creature in the Time Vortex(sfter th tower) who look like a shadow head.
The Manga called YUYU Hakusho, theres mention to a cretura called Uraotoko, a bidimensional Yokai (monster,devil,etc) that live in the bondarie between the dimensions.
This moster is a huge shadow head, that have inside it a paralell dimension very like the EoT, with many ships and planes (Bermudes' Triangle?).
the interesting is that i cant find info about this monster in the web.
